Title of Invention  A METHOD AND SYSTEM FOR DECODING COMPRESSED IMAGE DATA 

Abstract  The present invention provides a fast data converter for decoding compressed image data. This is accomplished by using a series of parallel and serial computational steps to decompress the compressed image data and reduce processing cycle time. The high speed decoder receives the input data stream including first and second parameters having initial values and which are representative of properties of the data stream, and a third parameter having a value which is representative of a decoding property of the decoder. The decoder then decodes the initial values of the first, second and third parameters to determine updated values of the first and second parameters by using a combination of parallel and serial processing steps. The decoder then compares the determined value of the reference parameter with the computed first subtraction value and outputs updated values for the first and second parameters based on the outcome of the comparison by the comparator to reduce the decoding cycle time. 
Full Text  A METHOD AND SYSTEM FOR DECODING COMPRESSED IMAGE DATA Field of tha invention The present invention relates to a methodand system for decoding compressed image data, and generally relates to a highspeed data processor and decoding technique, and more particularly, to a highspeed data processor and decoding technique for image processing devices such as printing, faxing, and/or scanning devices. Background Data compression is a term generally used to refer to a technique for reducing the number of digits (orbits) required to represent image data. Image data can be compressed using a known data compression technique, such as arithmetic or Huffman encoding, and a standard data compression format, such as international Telecommunication Union (ITU) Group 3 /4, Joint Bilevel Image experts Group (JBIG), or Joint Photographic Experts Group (JPEG). Data decompression, achieves the reverse, extracting the full image information fiom the compressed image data. Arithmetic encoding is a wellknown and efficient process for entropy encoding an input stream of image data. Entropy encoding is a process of compressing data (by assigning certain optimal numerical values called codes) based on a value of the probability of the image data. Arithmetic encoding is used in many data compression applications including the International Standard Organization (ISO) for JPEG and JBIG. Arithmetic decoding achieves the reverse of what the arithmetic encoding achieves by entropy decoding the encoded data stream and generating the image data fiom it Entropy decoding is the reverse process of entropy encoding, wherein the data is retrieved from the. assigned codes. The maximum speed of the overall decoding process depends on the ability of the decoder to perform these (and other) calculations and decisions quickly. In existing entropy decoders however, the computations require a series of sequential processing steps which include a subtraction operation, a subsequent comparison operation that depends on the results of the previous subtraction operation, and another subsequent subtraction operation which again depends on the results of the previous comparison operation. These types of sequential operations that depend on the result of a previous operation impose a significant constraint on the decoding operation and considerably slows down the speed of the decoding process. Therefore there is a need in the art for a faster decoding technique that does not have the dependencies inherent in the abovedescribed sequential process to increase the speed of the decoding process. Summary of the Invention The present invention provides a highspeed decoder of compressed image data. In one example embodiment, this is accomplished by receiving an input data stream including first and second parameters having initial values and which are representative of properties of the data stream, and a third parameter having a value which is representative of a decoding property of a decoder. The decoder then determines a value for a reference parameter as a function of the third parameter using a lookup table. In parallel, the analyzer computes first and second subtraction values, using initial values of the first and second parameters. The decoder further computes an updated value for the second parameter by adding the computed second subtraction value to the determined value of the reference parameter. In parallel, the decoder farther computes an updated value for the first parameter by using the initial value of the first parameter and the determined value for the reference parameter. In addition, the decoder compares the determined value of the reference parameter with the computed first subtraction value and outputs updated values for the first and second parameters based on the outcome of the comparison by the comparator. Another aspect of the present invention is a method for decoding compressed image data. The method is performed by receiving an input data stream including first and second parameters having initial values and which are representative of properties of the data stream, and a third parameter having a value which is representative of a decoding property of a decoder. A value for a reference parameter as a function of the third parameter is determined using the initial value of the third parameter and lookup table. In parallel, first and second subtraction values are computed, using initial values of the first and second parameters. Further, an updated value for the second parameter is computed by adding the computed second subtraction value to the determined value of the reference parameter, in parallel, an updated value for the first parameter is computed using the initial value of the first parameter and the determined value for the reference parameter. The determined value of the reference parameter is compared with the computed first subtraction value, and updated values for the first and second parameters based on the outcome of the comparison is outputted i to reduce decoding cycle time. Another aspect of the present invention is a computer jreadabl^mejiium xjiaving computerexecutable instructionsTor improved datarate detection in a '/_f £. ) cornmunication system including multiple transport channels supporting variable datarate transmissions. According to the method, the process includes receiving an input data stream including first and second parameters having initial values and which are representative of properties of the data stream, and a third parameter having a value which is representative of a decoding property of a decoder. A value for a reference parameter as a function of the third parameter is 1 determined using the initial value of the third parameter and a lookup table. In 1 parallel, first and second subtraction values are computed, using initial values of the first and second parameters. Further, an updated value for the second parameter is computed by adding the computed second subtraction value with the determined value of the reference parameter. In parallel, an updated value for the first parameter is computed using initial value of the first parameter and the determined value for the reference parameter. The determined value of the Teferencej>arameter is compared with the computed first subtraction value, and updated values for the first and second parameters based on the outcome of the comparison is outputted to reduce decoding cycle time. Another aspect of the present invention is a computer system for . detecting datarate detection signals received from a transmitter capable of x transmitting data at a plurality of data rates. The computer system comprises a . N ' storage device, an output device, and a processor programmed to repeatedly perform a method. The method is performed by receiving an input data stream including first and second parameters having initial values and which are representative of properties of the data stream, and a third parameter having a value which is representative of a decoding property of a decoder. A value for a reference parameter as a function of the third parameter is determined using the initial value of the third parameter and lookup table. In parallel, first and second subtraction values, using initial values of the first and second parameters are computed. Further, an updated value for the second parameter is computed by adding the computed second subtraction value with the determined value of the reference parameter. In parallel, an updated value for the first parameter is computed using the initial value of the first parameter and the determined value for the reference parameter. The determined value of the reference parameter is compared with the computed first subtraction value, and updated values for the first and second parameters based on the outcome of the comparison is outputted to reduce decoding cycle time. Other aspects of the invention will be apparent on reading the following detailed description of the invention and viewing the drawings that form a part thereof. Brief Description of the Accompanying Drawings  Eigure 1 is a flow chart illustrating a priorart data decompression process. Figure 2 is a flow chart illustrating a data decompression process according to the principles of the invention. Figure 3 is a block diagram illustrating major components of a decoder used in the data decompression process shown in Figure 2. Figure 4 is a block diagram illustrating major components of a data converter incorporating the decoder of the present invention. Figure 5 is a block diagram example of a suitable computing system environment for implementing embodiments of the present invention, such as those shown in Figures 2,3 and 4. Detailed Description The present invention provides an improved receiver by increasing the efficiency and reliability of datarate detection in a radio communication system including multiple transport channels supporting variable datarate transmissions. This is accomplished by providing computationally efficient and more accurate detection techniques. Figure 1 is a flowchart illustrating a priorart data decompression process 100 which implements an arithmetic decoding technique such as entropy decoding (see document T.82 of the Telecommunications Standardization Sector of the International Telecommunication Union (ITUT.82)). During the decoding process, the decoding is performed sequentially as shown in Figure 1 on an input stream of compressed image data. Three input parameters Acc> Chigh, and ST having initial values AccO, ChighO, and ST enter at step 110. The first parameter Ace represents a size of an interval between 0 and 1, the second parameter Chigh represents the bottom or base of the interval, and the third parameter ST represents the index value used to generate symbol probability estimates as specified in the ITUT.82 standard. The third parameter ST\s used to define probability estimates and is also a general representation of the image data, wherein its value is obtained and updated based on the image data and tables defined by the ITUT.82 (JBIG) standard. Step 120 includes obtaining a reference parameter LSZ based on a function of input parameter ST by addressing a lookup table. Step 130 includes updating the initial value of AccO to a new value Accl by subtracting the obtained reference parameter LSZ from the initial value AccO. IX can be seen that the subtraction operation depends upon the value assigned to the reference parameter LSZ and cannot be performed until the reference parameter LSZ is obtained. In general there is an inherent delay in obtaining the value of the third parameter iSrfrom a memory location, which in turn further delays obtaining the value of LSZ. Step 140 includes comparing the initial value of ChighO with the updated new value Accl. Again, the comparison at step 140 depends on the updated new value Accl and cannot be performed until the previous subtraction operation shown in Step 130 is completed. If ChighO is greater than or equal to the value Accl, then the initial value ChighO is updated to a new value Chigh 1, by subtracting the initial value ChighO from the new value Accl at step 150. Then at step 160 the process includes outputting with the new vahxo&Accl and Chighl for parameters Ace and Chigh, respectively. If however ChighO is less than the new value Accl then the process includes outputting the new value Accl for parameter Ace and the initial value ChighO for parameter Chigh. Once again, the downstream operations at steps 150 and 160 depend upon the outcome of the comparison at step 140. Bue to the dependencies in the sequential steps described above, there is delay in obtaining ST, obtaining LSZ, computing Accl, comparing ChighO with Accl, and lastly in computing Chighl. Therefore there are around five sequential delays in the above described priorart process. Generally, these delays increase in each of the steps 120,130,140, and 150 due to the dependencies between each sequential step in the prior art process. As such, it is difficult to improve the processing speed (or cycle time) of the decoder in software or hardware implementations of this process. Figure 2 is a flowchart illustrating a data decompression process 200 which implements an arithmetic decoding technique such as entropy decoding (see document T.82 of the Telecommunications Standardization Sector of the International Telecommunication Union (ITUT.82)) according to the teachings of the present invention. During the decoding process, the decoding is performed in parallel and serial steps as shown in Figure 2 on an input stream of compressed image data to reduce decoding cycle time. Three input parameters Ace, Chigh, and SThaving initial values AccO, ChighO, and ST enter at step 210. The first parameter Ace represents a size of an interval between 0 and 1, the second parameter Chigh represents the bottom orbase of the interval, and the third parameter ST represents the index value used to generate symbol probability estimates as specified in the ITUT.82 standard. The third parameter £7*is used to define probability estimates and is also a general representation of the image data wherein its value is obtained and updated based on the image data and tables denned by the ITUT.82 (JBIG) standard. In another embodiment, the initial value for the first parameter represents the size of an interval. In some embodiments, the initial value for the second parameter represents the base of the interval. In some embodiments, the initial value for the third parameter represents an index value used to generate symbol probability estimates as specified in the OTJT.82 standardStep 220 generally includes parallel computing steps 221,222, and 223 obtaining a value for a reference parameter LSZ based on a function of input parameter/{S2) by addressing a lookup table, and computing first and second subtraction values Al and Bl, respectively using initial values of the first and second parameters as follows; Al = AccOChighO Bl =ChighO~AccO Step 230 generally includes parallel computing steps 231, and 232 to update the value of the second parameter by adding the computed second subtraction value Bl to the determined value of the reference parameter LSZ, and to further update the value of the first parameter using initial value of the first parameter AccO and the determined value for the reference parameter LSZ, respectively. In other embodiments, the first subtraction valued/ is computed by subtracting the value of the second parameter from the first parameter, and the second subtraction value Bl is computed by subtracting the value of the first parameter from the second parameter, m other embodiments, the updated value for the first parameter Accl is computed by using the initial value of the first parameter and the determined value for the reference parameter as follows: Accl = AccO  LSZ Step 240 includes comparing the determined value of the reference parameter LSZ with the computed, first subtraction value AL In some embodiments, Step 240 is performed in parallel with Steps 231 and 232. Step 250 includes outputting the updated values for the first and second parameters based on the outcome of the comparison. In some embodiments, step 240 includes outputting the updated value of the first parameter and the initial value of the second parameter when the determined value of the reference parameter is less than the computed first subtraction value as follows. Accl =AccOLSZ Chighl = ChighO Step 240 further includes outputting updated values of the fiist and second parameters when the determined value of the reference parameter is not less than the computed first subtraction value as follows: Accl =LSZ Chighl =B1+LSZ It can be seen that the abovedescribed, decoding process 200 includes performing steps 210  250 in parallel and serial as shown in Figure 2 on an input stream of compressed image data. The parallel and serial steps in the decoding process 200 shown in Figure 2 reduces the number of dependencies present in the sequential processing steps present in the prior art decoding process 100 to enhance processing time. The decoding process 200 shown in Figure 2 reduces the approximately five sequential delays present in the priorart process 100 shown in Figure 1 to around 3. Figure 3 is a block diagram of the data converter 300 for data decompression according to the principles of the invention. Shown in Figure 3 are input module 310, analyzer 320, comparator 330, output module 340, context generator 345, context memory 350, and compressed image data 305. In operation, the input module 310 receives compressed image data (encoded image data) 305 in the form of an input data stream including first and second parameters having initial values which are representative of properties of the data stream, and a third parameter having a value which is representative of a decoding property of the decoder_3_00. In some embodiments, the initial value for the first parameter represents the size of an interval. In some embodiments, the initial value for the second parameter represents the base of the interval. In some embodiments, the initial value for the third parameter represents an index value used to generate symbol probability estimates as specified in the ITUT.82 standard, hi some embodiments, the third parameter represents the decoding state and is used to determine the reference parameter using the lookup table. The analyzer 320 connected to the input module 310 determines a value for a reference parameter as a function of the third parameter using a lookup table. Further, in parallel, the analyzer 320 computes first and second subtraction values, using initial values of the first and second parameters. The analyzer 320 then computes an updated value for the second parameter by adding the computed second subtraction value to the determined value of the reference parameter. Further, the analyzer920 computes in parallel an updated value for the first parameter by using the initial value of the first parameter and the determined value for the reference parameter. In some embodiments, the analyzer 320 computes the first subtraction value by subtracting the second parameter from the first parameter, computes the second subtraction value by subtracting the first parameter from the second parameter, and further computes an updated value for the first parameter by using the initial value of the first parameter and the determined value for the reference parameter. The comparator 330 connected to the analyzer 320 compares the determined value of the reference parameter with the computed first subtraction value, and the output module 340 connected to the analyzer 320 outputs updated values of the first and second parameters based on the outcome of the comparison by the comparator to reduce the processing time and the decoding cycle time. In some embodiments, the output module 340 outputs the updated value for the first parameter with a value obtained by subtracting the determined value for the reference parameter from the initial value of the first parameter and the initial value for the second parameter when the determined value of the reference parameter is less than the computed first subtraction value. In further embodiments, the output module 340 updates the value of the first parameter with the determinedreference value of the reference parameter and the second parameter by adding the second subtraction value to the determined reference parameter when the determined value of reference parameter is not less than the first subtraction value. Jn some embodiments, the output module 340 outputs the updated values for the first and second parameters when the determined value of the reference parameter is greater than the computed first subtraction value. In further embodiments, the output module 340 updates the value of the first parameter by using the determined value of the reference parameter, and further updates the value of the second parameter with a value obtained by adding the first subtraction value to the determined value of the reference parameter. The analyzer 320 combines the abovedescribed parallel and serial computation sequences to reduce processing cycle time. In some embodiments, the data converter 300 uses the context memory 350 to store reference parameters in the lookup table. In a further embodiment, the data converter includes a context generator 345 coupled to the context memory 350 and the output module 340. The context generator 345 is a logic used in the generation of addresses for the context memory 350, which in turn generates the input parameter ST. hi another embodiment, the context generator 345 is shared between an encoder and a decoder in generation of addresses used to access the context memory 350. Figure 4 is a block diagram illustrating major components of a data converter 400 incorporating the decoder 410 of the present invention and an encoder 420 on an integrated circuit device. As shown in Figure 4, the data converter includes encoder 420, decoder 410, and a logic such as the context generator 345 and the context memory 350 related to the generation and storing of the input parameter ST 445 is shared between the decoder 410 and the encoder 420. This sharing of the context generator 345and the context memory 350 results in reduction of the size of the device. The encoder 420 includes an encoder core 422 and a renonnalization module 460. Shown in Figure 4 is inputting of the image data into the encoder core 422 (coming from context generator 345). Compressed (encoded) data is output through an output module 425 coupled to the encoder 420. As shown in Figure 4, the data converter 400 includes a destuff processor 450 which receives the external input encoded data from the encoder 420 and feeds it to the decoder 410. The decoder 410 includes decoder core 412 and renonnalization module 460. The decoder core 412 receives the encoded data from the destuff processor through the renonnalization module 460, performs decompression of the encoded data and outputs the decompressed (decoded) data for use in image processing devices such as printers, faxes, scanning and/or other such devices through context generator 345. As shown in Figure 4, the decoder 410 shares the context memory 350 in obtaining a value for the reference parameter as a function of the third parameter using the lookup table. The renormalization modules 460 shown in Figure 4 are a combinatorial logic performing an internal parametric information update as specified by the IT(JT.82 JBIG standard renormalization routine for the decoder 410 and the encoder 420. The method 200 shown in Figures 2 may be implemented in input module 310, analyzer 320, comparator 330, output module 340, context generator 345 and context memory 350 as shown in Figure 2. Various aspects of the present invention are implemented in software, which is executed in the environment shown in Figure 5 or any other suitable computing environment. The present invention is operable in a number of other general purpose or special purpose computing environments. Some computing environments are personal computers, generalpurpose computers, server computers, hand held devices, laptop devices, multiprocessors, microprocessors, set top boxes, programmable consumer electronics, network PCs, minicomputers, mainframe computers, distributed computing environments and the like to execute the code, which is stored on a computer readable medium. The present invention may be implemented in part or in whole as computerexecutable instructions, such as program modules that are executed by a computer. Generally, program modules include routines, programs, objects, components, data structures and the like to perform particular tasks or to implement particular abstract data types. In a distributed computing environment, program modules may be located in local or remote storage devices. Figure 5 shows an example of a suitable computing system environment 500 for implementing embodiments of the present invention, such as those shown in Figures 2,3 and 4. Various aspects of the present invention are implemented in software, which may be run in the environment shown in Figure 5 or any other suitable computing environment The present invention is operable in a number of other general purpose or special purpose computing environments. Some computing environments are personal computers, server computers, handheld devices, laptop devices, multiprocessors, microprocessors, set top boxes, programmable consumer electronics, network PCs, niimcomputers, mainframe computers, distributed computing environments, and the like. The present invention may be implemented in part or in whole as computerexecutable instructions, such asj^jnjm^mochries that * are executed by a computer. Generally,program modules mclude routines, / M programs, objects, components, data structures and the like to perform particular I ^ tasks or to implement particular abstract data types. In a distributed computing environment, program modules may be located in local or remote storage devices. Figure. 5 shows a general computing device in the form of a computer 510, which may include a processing unit 502, memory 504, removable storage 512, and nonremovable storage 514. The memory 504 may include volatile 506 and non¬volatile memory 508. Computer 510 may include  or have access to a computing environment that includes  a variety of computerreadable media, such as volatile 506 and nonvolatile memory 508, removable 512 and nonremovable storage 514. Computerreadable media also include carrier waves, which are used to transmit executable code between different devices by means of any type of network. Computer storage includes RAM, ROM, EPROM & EEPROM, flash memory or other memory technologies, CD ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium capable of storing computerreadable instructions. Computer 510 may include or have access to a computing environment that includes input 516, output 518, and a communication connection 520. The computer may operate in a networked environment using a communication connection to connect to one or more remote computers. The remote computer may include a personal computer, server, router, network PC, a peer device or other common network node, or the like. The communication connection may include a Local Area Network (LAN), a Wide Area Network (WAN) or other networks. Conclusion The abovedescribed invention provides a fast decoding technique that does not have the dependencies inherent in the priorart sequential processes in order to increase the speed of the decoding process. Although, the abovedescribed invention is for a decoder, the principles of the invention can be incorporated in to an encoder to enhance the data compression process in highresolution image processing. The above description is intended to be illustrative, and not restrictive. Many other embodiments will be apparent to those skilled in the art The scope of the invention should therefore be determined by the appended claims, along with the full scope of equivalents to which such claims are entitled. WE CLAIM : 1. A method of decoding compressed image data, comprising: receiving compressed image data; and arithmetic decoding of the received compressed image data, wherein the arithmetic decoding of the received data includes a combination of parallel and serial processing steps to reduce processing time. 2. The method as claimed in claim 1, wherein receiving the compressed image data comprises: receiving an input data stream including first and second parameters having initial values and which are representative of properties of the data stream, and a third parameter having a value which is representative of a decoding property of a decoder. 3. The method as claimed in claim 2, wherein decoding the received compressed image data comprises: determining a value for a reference parameter as a function of the third parameter using a lookup table, in parallel, computing first and second subtraction values using initial values of the first and second parameters; computing an updated value for the second parameter by adding the computed second subtraction value to the determined value of the reference parameter, in parallel, computing an updated value for the first parameter using the initial value of the first parameter and the determined value for the reference parameter; comparing the determined value of the reference parameter with the computed first subtraction value; and outputting the updated values for the first and second parameters based on the outcome of the comparison. 4. The method as claimed in claim 3, wherein computing the first and second subtraction values, and further computing an updated value for the first parameter comprises: computing a first subtraction value by subtracting the second parameter from the first parameter; computing a second subtraction value by subtracting the first parameter from the second parameter; and computing an updated value for the first parameter by using the initial value of the first parameter and the determined value for the reference parameter. 5. The method as claimed in claim 4, wherein outputting the updated values of the first and second parameters comprises: if the determined value of the reference parameter is less than the computed first subtraction value, then outputting the updated value for the first parameter and the initial value for the second parameter; and if the determined value of the reference parameter is not less than the computed first subtraction value, then outputting the updated values for the first and second parameters. 6. The method as claimed in claim 3, wherein combination of parallel and serial processing steps provides a reduced processing cycle time. 7. The method as claimed in claim 3, wherein the initial value for the first parameter represents the size of an interval. 8. The method as claimed in claim 3, wherein the initial value for the second parameter represents the base of the interval. 9. The method as claimed in claim 3, wherein the initial value for the third parameter represents an index value used to generate symbol probability estimates as specified in the ITUT.82 standard. 10. A computer system for decoding compressed image data, comprising: a storage device; an output device; and a processor programmed to repeatedly perform a method as claimed in any of claims 1 to 9. 11. A highspeed data converter for decoding compressed image data, comprising: an input module to receive an input data stream including first and second parameters having initial values which are representative of properties of the data stream, and a third parameter having a value which is representative of a decoding property of a decoder; an analyzer to determine a value for a reference parameter as a function of the third parameter using a lookup table, in parallel, the analyzer to compute first and second subtraction values, using initial values of the first and second parameters, wherein the analyzer further computes an updated value for the second parameter by adding the computed second subtraction value to the determined value of the reference parameter, in parallel, the analyzer to further compute an updated value for the first parameter by using the initial value of the first parameter and the determined value for the reference parameter; a comparator to compare the determined value of the reference parameter with the computed first subtraction value; and an output module to output updated values of the first and second parameters based on the outcome of the comparison by the comparator. 12. The data converter as claimed in claim 11, wherein the analyzer computes the first subtraction value by subtracting the second parameter from the first parameter, computes the second subtraction value by subtracting the first parameter from the second parameter, and computes an updated value for the first parameter by using the initial value of the first parameter and the determined value for the reference parameter. 17 13. The data converter as claimed in claim 12, wherein the output module outputs an updated value for the first parameter and the initial value for the second parameter when the determined value of the reference parameter is less than the computed first subtraction value, and wherein the data converter updates value of the first parameter with a value obtained by subtracting the determined value for the reference parameter from the initial value of the first parameter. 14. The data converter as claimed in claim 13, wherein the output module outputs the updated values for the first and second parameters when the determined value of the reference parameter is not less than the computed first subtraction value, and wherein the data converter further updates the value of the first parameter by using the determined value of the reference parameter and further updates the value of the second parameter with a value obtained by adding the first subtraction value with the determined value of the reference parameter. 15. The data converter as claimed in claim 11, wherein the analyzer combines parallel and serial computation to reduce processing cycle time. 16. The data converter as claimed in claim 11, wherein the initial value for the first parameter represents the size of an interval. 17. The data converter as claimed in claim 11, wherein the initial value for the second parameter represents the base of the interval. 18. The data converter as claimed in claim 11, wherein the initial value for the third parameter represents an index value used to generate symbol probability estimates as specified in the ITUT.82 standard. 19. The data converter as claimed in claim 11, wherein the initial value for the third parameter represents the decoding state and is used to determine the reference parameter using the lookup table. 4(3 t 20. The data converter as claimed in claim 11, having a context memory to store reference parameters in the lookup table. 21. The data converter as claimed in claim 19, having a context generator to generate addresses for the context memory. 

1301chenp2003 assignment.pdf
1301chenp2003 correspondence others.pdf
1301chenp2003 correspondence po.pdf
1301chenp2003 description(complete).pdf
1301chenp2003 power of attrorney.pdf
abs 1301chenp2003 abstract.jpg
Patent Number  240956  

Indian Patent Application Number  1301/CHENP/2003  
PG Journal Number  25/2010  
Publication Date  18Jun2010  
Grant Date  10Jun2010  
Date of Filing  21Aug2003  
Name of Patentee  SASKEN COMMUNICATION TECHNOLOGIES LIMITED  
Applicant Address  3008 12TH B MAIN, HAL 2ND STAGE, INDIRANAGAR, BANGALORE560 008.  
Inventors:


PCT International Classification Number  H04N1/41  
PCT International Application Number  PCT/IB01/01672  
PCT International Filing date  20010913  
PCT Conventions:
