Title of Invention

AN IMPROVED METHOD OF CONTROLLING ACCESS TO AUDIO-VISUAL PROGRAMME ON A DIGITAL RECEIVER

Abstract The invention relates to a method of controlling access to audio-visual programmes on a digital receiver (1) of audio-visual programmes, regardless of the programme comprising the steps of: receiving an identifier of the currently displayed programme, locking the programme currently being displayed generated by a manual action during the current programme displaying, the step of locking triggering a step of writing the identifier in a memory of the receiver for locking this programme, blocking the displaying of the current programme if its identifier is stored in the predetermined memory.
Full Text The present invention relates to a simple method for
locking/unlocking a programme on a digital receiver of
audio-visual programmes, referred to hereinafter as a
receiver. The invention also relates to a receiver of
audio-visual programmes implementing the method.
Patent US 5,969,748 discloses a method of controlling
access to television channels. Locking is performed
from a list of accessible channels by selecting locking
criteria. The criteria selectable from a list are
schedule, topic, parental rating and/or channel. The
system operates as follows. After having entered his
password, the user enters on an interface a criterion
from a list of criteria, for example a topic. All the
programmes of a list of channels encountering this
topic are locked. When the user chooses to watch or
record a locked programme from the list of channels, a
screen window appears inviting him to input his
password. If the password input is correct, all the
programmes encountering the selected topic are
unlocked. The problem with this method is that it
operates only on the basis of a list of accessible
channels. It therefore proves to be rather impractical
according to this prior art to lock the programme of
the current channel, that is to say that to which the
user is connected at a given moment, since this channel
must previously have been tagged in a list of channels.
Another problem is that it is impossible to lock a
channel which is unknown a priori, that is to say which
does not appear in the list of channels. The list of
channels may in fact not be complete and the user may
find himself faced with a channel discovered by chance
and which it is impossible for him to lock. Moreover,
when the user chooses to unlock the programme, the mode
of unlocking is unique.
The object of the present invention is therefore to
alleviate the drawbacks of the prior art by proposing a
method of locking a programme on a digital decoder not
requiring the presence of a list of accessible
channels. The method in fact allows the user to lock
the programme to which the receiver is connected. The
method according to the invention additionally makes it
possible to unlock a programme according to various
modes. The invention will for example allow parental
control.
This aim is achieved by a method of controlling access
to audio-visual programmes on a digital receiver (1) of
audio-visual programmes, characterised in that it
comprises, regardless of the programme, a phase of
locking the programme currently being displayed
generated by an manual action during the current
programme displaying.
According to another feature, the phase of locking a
current programme comprises:
- a step of placing in memory at least one descriptor
sent in the packets transmitted , by the current
programme and identifying either the programme, or a
particular event of the programme,
- a step of activating the locking corresponding to the
stored descriptor.
According to another feature, the locking is selected
according to one of several modes such as:
- temporary locking,
- permanent locking,
- event-based locking.
According to another feature, the unlocking is selected
according to one of several modes such as:
- temporary unlocking,
- permanent unlocking,
- event-based unlocking.
According to another feature, the temporary unlocking
is eliminated by inhibiting or erasing the descriptor
from the memory,
- either following a step of detecting a change of
channel,
- or following a detection of a cycle of switching off
and switching on the apparatus broadcasting the audio-
visual programmes.
According to another feature, the unlocking comprises
the steps:
- of displaying a screen window indicating that the
chosen service is locked,
- of triggering, by means, access to the process for
unlocking the service,
- of displaying a screen window suggesting entry of the
user code or exit from the unlocking procedure,
- of comparing the entered code with a stored code,
- of displaying a screen window suggesting various
modes of unlocking, if the code entered is correct,
- of selecting a mode of unlocking,
- of unlocking the service according to the mode
chosen, or
- of displaying a screen window suggesting that the
user code be re-entered or that the procedure for
unlocking the service be exited, if the code entered is
incorrect.
According to another feature, failing selection, the
unlocking is temporary.
According to another feature, the re-locking of a
service unlocked in a temporary manner is automatic.
According to another feature, the event-based mode of
unlocking relates to the next event or to several
consecutive events thereof during which the operator
performs the unlocking.
According to another feature, the locking comprises the
steps:
- of accessing the process for locking the programme,
- of displaying a screen window prompting the user to
enter a user code or to exit the locking procedure,
- of displaying a screen window signalling that the
service is locked, if the user code entered is correct,
or
- of displaying a screen window suggesting that the
user code be re-entered or that the locking procedure
be exited, if the user code entered is incorrect.
According to another feature, the locking can be
performed from a list of user-accessible programmes.
According to another feature, the method comprises a
step of storing the descriptor of the current event
when the mode of unlocking is event-based and a step of
detecting, by the microprocessor, the change of
descriptor of the event so as to perform the event-
based unlocking and allow the decoding of the event.
Another aim of the invention is to propose a device
implementing this method.
This other aim is achieved by a digital receiver for
controlling access to audio-visual programmes
comprising a user interface with the receiver, this
interface comprising means for triggering locking of
the programme currently being displayed activated by an
manual action during the current programme displaying,
means for selecting via the user interface one of
several modes of locking and means of reaction of the
receiver ensuring the recording of the information
required for implementing the chosen locking.
According to another feature, the means of triggering
of the user interface comprise at least one button
making it possible to access the locking or unlocking
process.
According to another feature, the means of reaction
comprise means for storing the information associating
a programme with a mode of locking or of unlocking of
the receiver.
According to another feature, the means of reaction
comprise means of detecting an event of the stored
programme, of triggering the unlocking of the decoder
during the event and of causing locking upon detection
of the end of the event.
The invention, together with its characteristics and
advantages, will emerge more clearly from reading the
description given wxth reference to the appended- J.
drawings in which:
- figure 1 represents the operating diagram of a DVB
(Digital Video Broadcast) decoder,
- figure 2 represents in plan view a remote control
used for the decoder,
- figures 3 to 7 represent the monitor keyed with
various screens at various steps of the method,
- figure 8 represents a flowchart of the locking
procedure,
- figure 9 represents a flowchart of the unlocking
procedure.
The invention will be described in conjunction with
figures 1 to 9.
The invention relates to a method of locking/unlocking
a programme on any type of digital receiver of audio-
visual programmes, such as a decoder (1). Digital
decoders (1) are for example of the following types:
DVB (Digital Video Broadcast), DSS (Digital Satellite
System) or any type of Internet terminal. In all types
of digital decoder (1), there is a means for
identifying a programme broadcast on a channel in a
unique manner. In DVB, it is a triple identifying the
programme. This triple is composed of three identifiers
("network" ID, "transport stream" ID and "service" ID),
one relating to the network, a second, the transport
stream, and a third, the service. When it has not been
previously stored by the software, the triple
identifying the current programme can be retrieved, in
the case of a DVB decoder, by combining the information
found in the PMT table (in which the service ID
appears) and "SDT actual" table (in which the original
"network ID" and "transport stream ID" data appear. In
the case of an Internet terminal, this information will
be replaced with the complete name of the current URL
which is stored in the search, display and edit utility
(otherwise known as the "browser") and which identifies
a programme, in the form of a character string.
A DVB digital decoder used within the framework of our
invention is made up as follows.
The decoder is connected to a television (2) through a
"SCART" socket (28), to a video recorder (3) also
through a "SCART" socket (29) and to the switched
telephone network (6) through a modem (4).
The decoder (1) comprises a tuner (10) linked to a
frequency converter of an antenna (5) . The tuner (10)
is connected to an error correction circuit (12)
through a demodulator (11) . The output of the error
correction circuit (12) is linked to a demultiplexer
(13) . This demultiplexer (13) separates the various
data packets according to their content and sends them
to the relevant items through a buffer memory (14). The
relevant items include among others an access control
module comprising a chip card (15) inserted into a
connector (16), an audio decoder (17), a video decoder
(18) and a teletext management circuit (19) .
The access control module also comprises a descrambler
(20), through which any encrypted packet must pass
before being stored in the buffer memory (14) . The
descrambler (20) is managed by a verifier circuit (21),
which authorises or otherwise the descrambling as a
function of the user's access rights.
The decoder also comprises a microprocessor (22) linked
to an infrared interface (23) capable of receiving
signals from a remote control (24). The microprocessor
(22) is moreover linked to a memory (25) storing the
triples identifying each programme. The memory (25)
comprises a programme (80) for locking a programme, a
programme (81) for unlocking a programme as well as a
table (82) .
The microprocessor (22) reads the demultiplexed data of
the programme from the buffer memory (14). These data
of the channel correspond to information about each
event broadcast by the programme. This information may
be the name of the event, the parental rating, etc.
The signals originating from the video decoder (18),
from the audio decoder (17) and from the microprocessor
(22) are sent to a mixer circuit (35), connected to the
SCART socket (28) linking the decoder (1) to the
television (2) . This mixer (35) also receives signals
from a video keying circuit (27), this circuit
receiving signals formulated by the microprocessor from
a software layer (26) for managing the infrared signals
of the interface (23) .
All the manipulations will for example be performed
from a remote control (24) illustrated in figure 2. The
user connects up to the programme which he wants to
lock, as represented in step (801) of figure 8. He
presses a button of the remote control, indicating that
he wants to lock the programme to which he is
connected, as represented in step (802) of figure 8.
This button may for example bear the name "lock/unlock"
(240). Actuation of this button (240) causes the
programme of a specific signal by the remote control
(24) . The specific signal, received by the infrared
interface (23), triggers the processing, by the
microprocessor (22), of a specific subroutine (80)
stored in the memory (25) associated with the
microprocessor (22) and calling the locking process, as
represented in step (803) of figure 8. This specific
programme (80) causes the displaying on the television
(2) of a screen window (30) for entering a code, as
represented in step (804) of figure 8. This code may
for example be identical to a code already present in
the decoder (1) . This code should not be known to
persons for whom the programme is locked, children for
example, since it makes it possible to access the
locking or the unlocking of a programme. The code is
entered by the user from a digital keypad (241) on the
remote control (24) . The entry screen window (30) is
made up of an indication (300) indicating to the user
that he has just accessed the process for locking a
programme, while inviting him to input his code. This
screen window (30) also displays a zone (301) provided
for the displaying of the entry of the code, for
example in the form of asterisks so as to prevent the
code from being revealed to an onlooker, and two keys
(302, 303) corresponding to buttons of the remote
control (24). One button, for example "OK" (242), is*
intended for confirming entry of the code, the other
button, for example "EXIT" (243), for exiting the
locking process. If the user confirms his code, as
represented in step (805) of figure 8, the specific
subroutine (80), executed by the microprocessor (22),
compares the code entered with the code (250) stored in
the memory (25), as represented in step (806) of figure
8, and if the code entered is correct, the programme is
then locked as represented in step (807) . The specific
subroutine (80), executed by the microprocessor (22),
allows the sending of the information required for the
displaying of a screen window (31) which then appears,
while indicating the locking of the programme and while
inviting the user by pressing the "lock/unlock" button
(240) of the remote control (24) to access the process
for unlocking the programme, as represented in step
(807) of figure 8. The user may therefore activate the
unlocking programme, as represented in step (808) of
figure 8. If the user confirms his code and if the code
entered is incorrect, the specific subroutine (80),
executed by the microprocessor (22), compares the code
entered with the code (250) stored in the memory (25),
as represented in step (806) of figure 8, and sends the
information so as to display a screen window (32),
indicating that his code is incorrect. The screen
window (32) also invites the user, through a message
(320), to recommence entry of the code by pressing the
"OK" button (242), that is to say to return to step
(804) or to exit the locking process by pressing the
"EXIT" button (243), as represented in step (809) of
figure 8. The image of a locked programme is not
displayed on the screen of the television (2), the
device displays for example only the fact that the
programme is locked.
According to a variant embodiment, an event of a
current programme or a current programme is locked
following a single press of the "lock/unlock" button
(240) of the remote control (24) . No code entry is
required at the moment of the locking of the event or
of the channel. On the other hand, unlocking will
require the entry of a code stored previously, for
example when initially commissioning the decoder, with
the aid of a menu (not illustrated) . This variant
allows instantaneous locking from a single button, this
being especially beneficial when the viewer is
distracted by a telephone call, a visitor or some other
urgent situation.
The unlocking according to the method occurs as
follows.
When the user seeks to connect up to a locked
programme, the programme for using the decoder examines
the table (82) of locked programmes in the memory (25)
and invites the user to unlock by way of the screen
window (31), as represented in step (807) of figure 8.
The decoding of the programme is executed if the latter
is not locked. This screen window (31) invites the
user, via a message (310), to press the "lock/unlock"
button (240) so as to access the process for unlocking
the locked programme which he wants to display. After
pressing this button (240) , the specific signal,
received by the infrared interface (23), triggers the
processing, by the microprocessor (22), of a specific
subroutine (81) stored in the memory (25) associated
with the microprocessor (22) and calling the unlocking
process, as represented in step (901) of figure 9. A
new screen window (33) then appears. This screen window
(33) is made up of a text zone (330), indicating that
the user has just entered the process for unlocking the
programme and inviting him to input his code, as
represented in step (902) of figure 9. This code is the
same as the one used for locking a programme. The user
enters his code with the aid of the keypad (241) of the
remote control (24). This entry is manifested by the
displaying of asterisks in the zone (331) of the screen
window (33) . The user confirms his code by virtue of
the "OK" button (242) or prefers to exit the unlocking
process via the "EXIT" button (243). In the latter
case, the programme then remains locked. After
confirming the code, as represented in step (903) of
figure 9, the specific subroutine (81) executed by the
microprocessor (22) compares the code entered with the
code (250) stored in the memory (25), as represented in
step (904) of figure 9, and if the code entered is
correct, sends the information so as to display a new
screen window (34), as represented in step (905) of
figure 9. This screen window (34) allows the user to
select a particular mode of unlocking for the locked
programme to which he is connected. To do this, the
screen window (34) is made up of a text zone (340)
reminding the user that he is in an unlocking process,
of two keys (302, 303), corresponding to the "OK"
button (242) and "EXIT" button (243) of the remote
control (34), respectively for confirming and exiting
the process and of a zone (341) for selection of the
mode of unlocking. This selection is made by pressing
two shift buttons "" (245) of the remote
control (24). These shift buttons (244, 245),
symbolised on the screen window (34), on either side of
the text zone (341) presenting the mode of unlocking,
through two keys "" (343), allow
scrolling of the modes of unlocking the programme. The
use of the shift buttons (244, 245) allows the display
of various unlocking menus provided, corresponding to
the following three modes: temporary unlocking,
permanent unlocking or event-based unlocking. By acting
on the shift arrows (24 4, 245) of the remote control
(24), the user selects one of these modes, then
confirms his choice by pressing the "OK" button (242)
on his remote control (24), as represented in step
(906) of figure 9. The programme is then unlocked
according to the mode chosen, as represented in step
(907) of figure 9. The user can at any moment choose to
leave the unlocking process by pressing the "EXIT"
button (243). If, after comparison in step (904), the
code entered is incorrect, the specific subroutine
executed by the microprocessor sends the information so
as to display a screen window (32) indicating that the
code entered is incorrect. The window also invites the
user in a step (910) to re-enter his code by pressing
the "OK" button (242), that is to say to return to step
(902) or to exit the unlocking process by pressing the
"EXIT" button (243).
Failing selection with the aid of the scroll buttons
(244, 245), the mode of unlocking after a certain time
delay (909) is fixed at "temporary" by the programme
(81), as represented in step (908) of figure 9.
Temporary unlocking of the programme signifies that if
the user leaves the programme which he has just
unlocked in order to connect up to, for example,
another programme and should the user return to the
programme that he had unlocked, this programme will
again be locked. The user will therefore have to
instigate a new unlocking process if he wishes to have
access thereto. This mode allows the user who unlocks a
programme not to have to worry about locking the
programme when he leaves it.
Permanent unlocking of the programme signifies that if
the user leaves the programme for, for example, another
programme and should he return to the initial
programme, the latter will still be unlocked. This
allows the user to unlock a programme for which he
estimates that an inaccessibility is no longer
necessary.
Event-based unlocking signifies that the user unlocks
the programme for the time corresponding to the
remaining duration of the event in progress. After the
event-based unlocking of the programme, when the event
has terminated, the programme is locked again.
It is possible to extend event-based unlocking to the
event following the event in progress or even to
several consecutive events. In this case the programme
(81) performs the reading of the code identifying the
event and those following it, and interrupts the
programme when the latter no longer corresponds to the
event or to the event sequence chosen.
In a process for locking a programme, the memory (25)
stores the triple identifying the programme. Through
the use of a so-called MMI software layer (26), the
microprocessor (22) prohibits connection to the desired
programme, that is to say does not open the video and
audio streams. Thereafter, through the use of this
software layer (26), the microprocessor acts on the
video keying circuit (27) which will manage the display
of the screen window (31) on the television (2)
indicating that the programme is locked. At each change
of programme, the microprocessor (22) scans the memory
(25) so as to ascertain whether the triple identifying
the current programme which the user has selected is
contained in the table (82) . If the triple is stored in
the table (82) of the memory (25), the microprocessor
(22), through the software layer (26), disables the
video and audio connection, and then acts on the video
keying circuit (27) which will then take charge of the
display of the locking messages. The video keying
circuit (27) also takes charge of showing all the
screen windows for entry, unlocking, etc.
When the unlocking of the programme is temporary, the
microprocessor (22) authorises the mixer (35) to send
the information to the television (2). The programme is
automatically re-locked after a change of programme.
When the unlocking of the programme is permanent, the
triple is removed from the memory (25) without being
reincorporated, except in the case of a new locking of
the programme.
When the unlocking relates to a particular event of a
programme, the memory (25) will store an information
cue relating to the event in progress for which the
user wishes that the programme be unlocked. This
information cue is stored among other information cues
about the event in the buffer memory (14). This
information cue is for example the identifier of the
event in progress of a given programme and has the name
"event ID". This "event ID" identifier is extracted
from the information broadcast in the "EIT
present/following" table of the current event. During a
subsequent selection of the event by a user, a
comparison is made between the "event ID" identifier of
the event selected and the "event ID" identifier
stored. If these values are equal, the programme
remains unlocked, the unlocked event has not in fact
terminated. If these values are different, the
programme is re-locked automatically since the event
for which the programme has been unlocked has
terminated. In the latter case, the "EIT
present/following" table has altered or, stated
otherwise, its version number has been incremented.
When the user performs an event-based unlocking, the
microprocessor (22) receives, from the other items, the
signal for detecting a change of event. The
microprocessor (22) then acts on the software layer
(26) so as to re-lock the programme. It is also
possible to unlock the following event or even several
consecutive events.
It is possible to imagine selection of a mode of
locking. The locking could be temporary, permanent or
event-based. The locking procedure would then be the
same as the unlocking procedure presented above. In the
case where event-based locking is desired, the "event
ID" identifier of the event in progress of a programme
is taken out of the "EIT present/following" table and
stored in the memory (25) . This event may already form
the subject of a locking, for example temporary or
permanent, of the programme on which it is broadcast.
During event-based locking, the "event ID" identifier
of the current event is compared with the "event ID"
identifier stored. If their values are equal, this
signifies that the event for which the programme is
locked has not terminated, the programme then remains
different, this signifies that the event has changed
and the programme unlocks automatically.
It should be obvious to persons versed in the art that
the present invention allows embodiments in numerous
other specific forms without straying from the field of
application of the invention as claimed. Consequently,
the present embodiments must be regarded by way of
illustration, but may be modified within the field
defined by the scope of the attached claims, and the
invention should not be limited to the details given
herein above.
We Claim
1. An improved method of controlling access to audio-visual programmes on
a digital receiver (1) of audio-visual programmes, characterised by
comprising regardless of the programme, the steps of:
- receiving an identifier of the currently displayed programme,
- locking the programme currently being displayed generated by a manual
action during the current programme displaying, the step of locking
triggering a step of writing the identifier in a memory of the receiver for
locking this programme.
- blocking the displaying of the current programme if its identifier is stored
in the predetermined memory.
2. The method as claimed in claim 1, wherein the phase of locking a current
programme comprises the step of:
- placing in memory at least one descriptor sent in the packets transmitted
by the current programme and identifying either the programme, or a
particular event of the programme, and
- activating the locking corresponding to the stored descriptor.
3. The method as claimed in claim 1 or 2, wherein the locking is selected
according to one of several modes such as:
- temporary locking,
- permanent locking,
- event-based locking.
4. The method as claimed in claim 1, comprising a phase of unlocking being
selected according to one of several modes such as:
- temporary unlocking,
- permanent unlocking,
- event-based unlocking.
5. The method as claimed in claim 4, wherein the temporary unlocking is
eliminated by erasing the descriptor from the memory,
- following a step of detecting a change of channel, or
- following a detection of a cycle of switching off and switching on the
apparatus broadcasting the audio-visual programmes;
said descriptor identifying the service unlocked.
6. The method as claimed in claim 1, 4 or 5, comprising an unlocking phase,
having the steps of:
- displaying a screen window (31) indicating that the chosen service is
locked,
- triggering, by means, access to the process for unlocking the service,
- displaying a screen window (33) suggesting entry of the user code or exit
from the unlocking procedure,
- comparing the entered code with a stored code,
- displaying a screen window (34) suggesting various modes of unlocking, if
the code entered is correct,
- selecting a mode of unlocking,
- unlocking the service according to the mode chosen, or
- displaying a screen window (32) suggesting that the user code be re-
entered or that the procedure for unlocking the service be exited, if the
code entered is incorrect.
7. The method as claimed in claim 6, wherein failing selection, the unlocking
is temporary.
8. The method as claimed in one of claims 4 to 7, wherein the re-locking of a
service unlocked in a temporary manner is automatic.
9. The method as claimed in claim 4 or 6, wherein the event-based mode of
unlocking relates to the next event or to several consecutive events
thereof during which the operator performs the unlocking.
10.The method as claimed in claim 1, wherein locking comprises the steps: -
- accessing the process for locking the programme,
- displaying a screen window (30) prompting the user to enter a user code
or to exit the locking procedure,
- displaying a screen window (31) signaling that the service is locked, if the
user code entered is correct, or
- displaying a screen window (32) suggesting that the user code be re-
entered or that the locking procedure be exited, if the user code entered
is incorrect.
11.The method as claimed in claim 10, wherein the locking can be performed
from a list of user-accessible programmes.
12.The method as claimed in claim 2 or 4, comprising: storing the descriptor
of the current event when the mode of unlocking is event-based; and
detecting by a microprocessor (22), the change of descriptor of the event
so as to perform the event-based unlocking and allow the decoding of the
event.-
13.Digital receiver (1) for controlling access to audio-visual programmes
comprising a receiving means of an identifier of currently displayed
programme, a user interface with the receiver (1), the user interface
comprising means for triggering locking of the programme currently being
displayed activated by an manual action during the current programme
displaying, the means for triggering locking controlling a means for writing
the received identifier in a memory for indicating the locking state of this
programme, means for selecting via the user interface one of several
modes of locking and means of reaction of the receiver (1) ensuring the
recording of the information required for implementing the chosen
locking, a means for blocking the displaying of the current programme if
its identifier is stored in the predetermined memory.
14.The digital receiver as claimed in claim in claim 13, wherein the means for
triggering the user interface comprise at least one button making it
possible to access the locking or unlocking process.
15.The digital receiver as claimed in claim 13 or 14, wherein the means of
reaction comprise means for storing the information associating a
programme with a mode of locking or of unlocking of the receiver (1).
16.The digital receiver as claimed in claim in claim 13, wherein the means of
reaction comprise means of detecting an event of the stored programme,
triggering the unlocking of the decoder during the event, and of causing a
locking upon detection of the end of the event.


The invention relates to a method of controlling access to audio-visual
programmes on a digital receiver (1) of audio-visual programmes, regardless of
the programme comprising the steps of: receiving an identifier of the currently
displayed programme, locking the programme currently being displayed
generated by a manual action during the current programme displaying, the step
of locking triggering a step of writing the identifier in a memory of the receiver
for locking this programme, blocking the displaying of the current programme if
its identifier is stored in the predetermined memory.

Documents:

477-cal-2001-correspondence1.1.pdf

477-cal-2001-examination report1.1.pdf

477-cal-2001-form 18.1.pdf

477-cal-2001-form 26.1.pdf

477-cal-2001-form 3.1.pdf

477-cal-2001-form 5..1pdf

477-CAL-2001-FORM-27.pdf

477-cal-2001-granted-abstract.pdf

477-cal-2001-granted-claims.pdf

477-cal-2001-granted-correspondence.pdf

477-cal-2001-granted-description (complete).pdf

477-cal-2001-granted-drawings.pdf

477-cal-2001-granted-examination report.pdf

477-cal-2001-granted-form 1.pdf

477-cal-2001-granted-form 18.pdf

477-cal-2001-granted-form 2.pdf

477-cal-2001-granted-form 26.pdf

477-cal-2001-granted-form 3.pdf

477-cal-2001-granted-form 5.pdf

477-cal-2001-granted-priority document.pdf

477-cal-2001-granted-reply to examination report.pdf

477-cal-2001-granted-specification.pdf

477-cal-2001-granted-translated copy of priority document.pdf

477-cal-2001-others.pdf

477-cal-2001-priority document1.1.pdf

477-cal-2001-reply to examination report1.1.pdf

477-cal-2001-translated copy of priority document1.1.pdf


Patent Number 244523
Indian Patent Application Number 477/CAL/2001
PG Journal Number 50/2010
Publication Date 10-Dec-2010
Grant Date 09-Dec-2010
Date of Filing 27-Aug-2001
Name of Patentee THOMSON LICENSING S.A.
Applicant Address 46 QUAI A. LE GALLO, F-92100 BOULOGNE-BILLANCOURT
Inventors:
# Inventor's Name Inventor's Address
1 GAUTHIER RENE 4 RUE DES GENETS, F-56640 ARZON
2 DENIAU ERIC LA PRISE, F-35190 LA BAUSSAINE
3 RENAULT WILLIAM 8 RUE DE BELLE EPINE, F-35510 CESSON SEVIGNE
PCT International Classification Number H04N 7/16
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 0011264 2000-09-05 France