Title of Invention

A METHOD FOR IMPROVING THE QUALITY OF IMAGING IN VIDEO IMAGING SYSTEMS

Abstract A METHOD FOR IMPROVING THE QUALITY OF IMAGING IN VIDEO IMAGING SYSTEMS AND A ULTRASOUND SYSTEM THEREOF ABSTRACT Disclosed herein is a method for improving the quality of imaging in video imaging systems. One particular embodiment wherein the method is implemented is an ultrasound transducer. The method of the invention comprises of scaling the video image zone from black to white within a predefined bit range without having to allocate a part of the digital bit range to the pedestal signal from the sync tip. The method enables achieving a resolution of 2.9mv at the DAC output (300) by feeding all 256 levels of signals in the form of echo data (230) received from the video ram (280) to the DAC (290) and scaling said signals (300) over 0 to 0,75V range.
Full Text


We claim:
1. A method for improving the quality of imaging in video imaging systems,
the method comprising:
scaling the video image zone from black to white within a predefined bit range as herein described, characterized in that the scaling is performed without having to allocate a part of the digital bit range to the pedestal signal from the sync tip.
2. The method as claimed in claim 1, wherein the signal level Is IV sync tip to white peak with 25% reserved for sync tip to pedestal level.
3. The method as claimed in claim 1, wherein the method is implementable in video imaging systems having positive white peak as well as negative white peak with an appropriate change in the digital to analog level map.
4. A method of processing echo data (230) available in a video ram (280) of an imaging system (240) before being presented to a digital to analog converter (DAC) (290) for generating composite video baseband signal (330), characterized in that the method comprising:
storing said echodata in 256 levels in a local buffer (270).
generating video ram address (390) corresponding to the echo data samples positions (360) on a scanline (350)
writing buffer data (400) in the respective video ram address ;
incrementing X address of video ram (410) for IH line progressively and increment Y address of video ram after every horizontal line during video display scan time ;
reading video data (420) from corresponding video ram locations ,and presenting said data to the digital to analog converter in the right time slots, wherein the method enables achieving a resolution of 2.9mv at the DAC output (300) by feeding all 256 levels of signals in the form of echo data (230) received from the video ram (280) to the DAC (290) and scaling said signals (300) over 0 to 0.75V range.

5. An ultrasound System having an improved image resolution comprising:
analog to digital converter (ADC) (250) for receiving echo data (230)
characterized in that the echo data (230) is converted on a digital scale of 256 levels on an 8-bit analog to digital converter (ADC) (250);
a microcontroller with local buffer (270) for receiving and storing the echo data (230) from analog to digital converter (ADC) (250) and placing the echo data (230) in a video ram (280) in the right addresses; and
a digital to analog converter (DAC) (290) for receiving the echo data (230) from the microcontroller with local buffer (270), wherein a resolution of 2.9mv at the DAC output (300) is achieved by feeding all 256 levels of signals in the form of echo data (230) received from the video ram (280) to the digital to analog converter (DAC) (290) and scaling said signals (300) over 0 to 0.75V range.
6. The method as claimed in claim I to 4, wherein said method is
implementable in systems including digital televisions, set top boxes, DVDs, VCDs, TV
Cards in Personal Computers with composite video baseband signal out terminals and
digital video cameras, ASICs, FPGAs, any other programmable device implementing
MPEG decoders; encoders or combinations thereof, video encoders and all categories of
ICs wherein video encoding is carried out as one of the IC processes.



Documents:

104-CHE-2005 CORRESPONDENCE OTHERS 06-01-2010.pdf

104-CHE-2005 CORRESPONDENCE OTHERS.pdf

104-CHE-2005 CORRESPONDENCE PO.pdf

104-CHE-2005 DESCRIPTION (COMPLETE).pdf

104-CHE-2005 DRAWINGS.pdf

104-CHE-2005 FORM-18.pdf

104-CHE-2005 FORM-3.pdf

104-CHE-2005 FORM-5.pdf

104-CHE-2005 OTHER DOCUMENT 17-08-2009.pdf

104-CHE-2005 OTHERS-17-08-2009.pdf

104-CHE-2005 POWER OF ATTORNEY.pdf

104-che-2005 abstract.pdf

104-che-2005 claims.pdf

104-che-2005 correspondance others.pdf

104-che-2005 description(complete).pdf

104-che-2005 form-1.pdf


Patent Number 241030
Indian Patent Application Number 104/CHE/2005
PG Journal Number 25/2010
Publication Date 18-Jun-2010
Grant Date 16-Jun-2010
Date of Filing 07-Feb-2005
Name of Patentee BPL LTD
Applicant Address BPL LTD, SYSTEM HOUSE, PALAKKAD-678007,
Inventors:
# Inventor's Name Inventor's Address
1 S. MURALIDHARAN F2-SHANTHI NIKETAN, 114, 13TH MAIN, BINNY LA YOUT 2ND STAGE, VIJAYANAGAR, BANGALORE-560 040,
PCT International Classification Number H04N
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 NA