 |
|
|
|
|
|
 Title: |
WO0028736A1:
ANALOG VIDEO TAGGING AND ENCODING SYSTEM[French]
[ Derwent Title ]
|
Country:
Kind: |
WO World Intellectual Property Organization (WIPO)
A1 INTERNATIONAL APPLICATION PUBLISHED WITH INTERNATIONAL SEARCH REPORT i
|
| |
| Inventor: |
BARTON, James, M.; 101 Sund Avenue, Los Gatos, CA 95032, United States of America
LOOK, Howard; 576 Palo Alto Avenue, Mountain View, CA 94041, United States of America
|
| Assignee: |
TIVO, INC., 894 Ross Drive, Sunnyvale, CA 94089, United States of America
News, Profiles, Stocks and More about this company
|
| Published / Filed: |
2000-05-18
/ 1999-11-05
|
| Application Number: |
WO1999US0026178
|
| IPC Code: |
Advanced:
H04N 7/025;
Core:
more...
IPC-7:
H04N 7/025;
|
| ECLA Code: |
H04N7/025;
|
| Priority Number: |
|
| Abstract: |
An analog video tagging and encoding system. The invention inserts an analog tag frame into the analog video stream such that the luminance (Y) values are made to approach zero, i.e., black, allowing a potential tag frame to be quickly identified. Tag information is then encoded as a structured color pattern into the chrominance (Cb and Cr) portions of the frame, making the tag itself invisible to the casual viewer and contains program start/stop information, program segment identification, or data downloads. The color pattern is chosen such that when it is converted into digital form, the digital signal so produced may be easily and minimally parsed to recognize the presence or absence of a tag within a normal frame time period. In a simple embodiment of the invention, the structured analog color pattern may appear as a pattern of colored blocks aligned with the macroblock segmentation performed on the analog signal by the MPEG encoding process, causing the DC component of the encoded Cr and Cb macroblocks to precisely reflect the color pattern.
[French]
|
| Attorney, Agent or Firm: |
GLENN, Michael, A. ;
|
| INPADOC Legal Status: |
Show legal status actions
Family Legal Status Report
|
| Designated Country: |
AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG UZ VN YU ZA ZW,
European patent:
AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE,
OAPI patent:
BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG,
ARIPO patent:
GH GM KE LS MW SD SL SZ TZ UG ZW,
Eurasian patent:
AM AZ BY KG KZ MD RU TJ TM
|
| Family: |
Show 5 known family members
|
First Claim:
Show all claims |
CLAIMS 1 . A process for encoding in-band data into a video stream, comprising the steps of:
|
Description
Expand description |
+ ANALOG VIDEO TAGGING ANDENCODING SYSTEM
+ BACKGROUND OF THE INVENTION
+ TECHNICAL FIELD
The invention relates to the encoding of data into analog television broadcast signals. More particularly, the invention relates to the in- band encoding of informational data into an analog television broadcast signal.
+ SUMMARY OF THE INVENTION
The invention provides an analog video tagging and encoding system. The invention provides a robust tagging system that encodes in-band data into an analog video broadcast signal. In addition, the invention allows frame- accurate capture of video frames upon reception.
+ Brief Description of the Drawings Fig. 1 is a block schematic diagram of an analog broadcast signal according to the invention; Fig. 2 is a schematic diagram of a frame in an Moving Pictures Experts Group (MPEG) stream according to the invention;
Fig. 3 is a block schematic diagram of the partitioning of an active picture region into macroblocks according to the invention; Fig. 4 is a block schematic diagram of the layout of a 4:2:0 macroblock according to the invention; Fig. 5 is a block schematic diagram of the layout of a 4:2:2 macroblock according to the invention; Fig. 6 is a block schematic diagram of the layout of a 4:2:4 macroblock according to the invention; Fig. 7 is a block schematic diagram of the Discrete Cosine Transform (DCT) of an 8x8 block according to the invention;
+ DETAILED DESCRIPTION OF THE INVENTION
The invention is embodied in an analog video tagging and encoding system. A system according to the invention provides an analog video tagging and encoding system that allows the user to encode informational data in- band into an analog video data stream. The invention additionally provides a tagging method that survives the changes to the video frame format that occur during the transmission process.
|
|
