Television – Bandwidth reduction system – Plural video programs in single channel
Reexamination Certificate
1997-01-31
2001-02-13
Tung, Bryan (Department: 2713)
Television
Bandwidth reduction system
Plural video programs in single channel
C348S390100
Reexamination Certificate
active
06188436
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a video broadcast system which incorporates an apparatus for temporally shifting video data within a video signal for a single video program.
Conventional video broadcast systems for transmitting video signals from a central location to a plurality of remote viewing locations may be of several different types, including cable television systems and satellite-based broadcast systems. Since the overall bandwidth of a video broadcast system is limited, there is a limit to the number of video channels that can be included in a broadcast transmission.
U.S. Pat. No. 5,216,503 to Paik, et al. discloses a statistical multiplexing apparatus which is used to selectively compress a plurality of video signals prior to being broadcast. In the Paik, et al. system, each video signal is provided to an encoder prior to being broadcast. Each encoder is connected to a respective buffer, which is in turn connected to a multiplexer. Each encoder is connected to a controller, which generates coding level commands to control the degree to which the encoders compress the video signals.
SUMMARY OF THE INVENTION
The invention is directed to an apparatus for temporally shifting video data within a video signal. The apparatus is provided with a video data source for providing a video signal and a signal splitter for generating a first video data stream and a second video data stream, the first video data stream comprising video data in excess of a threshold. The apparatus includes means for temporally shifting the excess video data in the first video data stream relative to the second video data stream and means for recombining the first video data stream with the second video data stream after the first video data stream has been temporally shifted relative to the second video data stream.
The means for temporally shifting the excess video data in the first video data stream relative to the second video data stream may include a first delay buffer for delaying the first video data stream by an adjustable time period and a second delay buffer for delaying the second video data stream by a fixed time period. The apparatus may also include a complexity detector for generating a complexity signal relating to the complexity of the video signal and a video encoder for encoding the video signal based upon the complexity signal before the video signal is transmitted to the signal splitter.
The video signal shifting apparatus may be included as part of a video broadcast system for generating a plurality of program signals and broadcasting the program signals. The video broadcast system may include a first program generator for generating a first program signal, a second program generator for generating a second program signal, a multiplexer for combining the first and second program signals, and means for broadcasting the program signals to a plurality of remote locations. The broadcasting means may include a transmitter coupled to receive the program signals from the multiplexer, a satellite coupled to receive the program signals from the transmitter, a receiver for receiving signals from the satellite, and a decoder connected to receive signals from the receiver.
These and other features and advantages of the present invention will be apparent to those of ordinary skill in the art in view of the detailed description of the preferred embodiment, which is made with reference to the drawings, a brief description of which is provided below.
REFERENCES:
patent: 584658 (1998-12-01), Uz et al.
patent: 4093823 (1978-06-01), Chu
patent: 4494232 (1985-01-01), Dambrackas
patent: 4587514 (1986-05-01), Schas et al.
patent: 4626829 (1986-12-01), Hauck
patent: 4888779 (1989-12-01), Karabed et al.
patent: 4918523 (1990-04-01), Simon et al.
patent: 4975771 (1990-12-01), Kassatly
patent: 5005171 (1991-04-01), Modisette, Jr. et al.
patent: 5038389 (1991-08-01), Mizuno
patent: 5097261 (1992-03-01), Langdon, Jr. et al.
patent: 5115309 (1992-05-01), Hang
patent: 5122873 (1992-06-01), Golin
patent: 5128754 (1992-07-01), Dhein
patent: 5136375 (1992-08-01), Citta et al.
patent: 5216503 (1993-06-01), Paik et al.
patent: 5231494 (1993-07-01), Wachob
patent: 5291281 (1994-03-01), Paik et al.
patent: 5319707 (1994-06-01), Wasilewski et al.
patent: 5361096 (1994-11-01), Ohki et al.
patent: 5367334 (1994-11-01), Nishino et al.
patent: 5376968 (1994-12-01), Wu et al.
patent: 5392223 (1995-02-01), Caci
patent: 5400401 (1995-03-01), Wasilewski et al.
patent: 5432790 (1995-07-01), Hluchyj et al.
patent: 5440334 (1995-08-01), Walters et al.
patent: 5442626 (1995-08-01), Wei
patent: 5446916 (1995-08-01), Derovanessian et al.
patent: 5448568 (1995-09-01), Delpuch et al.
patent: 5461619 (1995-10-01), Citta et al.
patent: 5475716 (1995-12-01), Huang
patent: 5479210 (1995-12-01), Cawley et al.
patent: 5495291 (1996-02-01), Adams
patent: 5499245 (1996-03-01), Lee et al.
patent: 5506844 (1996-04-01), Rao
patent: 5509017 (1996-04-01), Brandenburg et al.
patent: 5515377 (1996-05-01), Horne et al.
patent: 5521945 (1996-05-01), Krudson
patent: 5532744 (1996-07-01), Akiwumi-Assani et al.
patent: 5533009 (1996-07-01), Chen
patent: 5541852 (1996-07-01), Eyuboglu et al.
patent: 5548532 (1996-08-01), Manand et al.
patent: 5550589 (1996-08-01), Shiojiri et al.
patent: 5550590 (1996-08-01), Sakazawa et al.
patent: 5557419 (1996-09-01), Muto
patent: 5563961 (1996-10-01), Rynderman et al.
patent: 5583562 (1996-12-01), Birch et al.
patent: 5592470 (1997-01-01), Rudrapatna et al.
patent: 5594491 (1997-01-01), Hodge et al.
patent: 5629736 (1997-05-01), Haskell et al.
patent: 5633683 (1997-05-01), Rosengren et al.
patent: 5646942 (1997-07-01), Oliver et al.
patent: 5675732 (1997-10-01), Majeti et al.
patent: 5682387 (1997-10-01), Satoh
patent: 5687163 (1997-11-01), Fox et al.
patent: 5708664 (1998-01-01), Budge
patent: 5719632 (1998-02-01), Hoang et al.
patent: 5757801 (1998-05-01), Arimilli
patent: 5771316 (1998-06-01), Uz
patent: 5790177 (1998-08-01), Kassatly
patent: 5793425 (1998-08-01), Balakrishman
patent: 5812334 (1998-09-01), Behrens et al.
patent: 5847760 (1998-12-01), Elamaliach et al.
patent: 5862140 (1999-01-01), Shen
patent: 574 724 A2 (1993-12-01), None
patent: 615 384 A2 (1994-09-01), None
patent: 621 730 A2 (1994-10-01), None
patent: 712 251 A2 (1996-05-01), None
patent: 273653 (1996-01-01), None
patent: 96/13125 (1996-05-01), None
Abbas et al., “Performance analysis of an ATM statistical multiplexer with batch arrivals”, IEE Prc.-Commun., vol. 141, No. 3, Jun. 1994, pp. 190-195.
Anderson et al., “Support For Continuous Media in the Dash System1”, 1990 IEEE, pp. 54-61.
Beakley, “Channel Coding for Digital HDTV Terrestrial Broadcasting”, IEEE Transaction on Broadcasting, vol. 37, No. 4, Dec. 1991, pp. 137-140
Dixit et al., “Video Traffic Smoothing and ATM Multiplexer Performance”, 1991 IEEE, pp. 8B.3.1-8B.3.5.
Eleftheriadis et al., “Optimal Data Partitioning of MPEG-2 Coded Video”, 1994 IEEE, pp. 273-277.
Eng et al., “Time-Compression Multipolexing (TCM) of Three Broadcast-Quality TV Signal on a Satellite Transponder”, The Bell System Technical Journal, vol. 62, No. 10, Part 1, Dec. 1983, pp. 2853-2863.
Garcia et al., “Statistical Multiplexing Gain Using Space Priority Mechanism”, 1991 IEEE, pp. 27.3.1-27.3.5.
Gemmell et al., “Multimedia Storage Servers: A Tutorial”, IEEE, May 1995, pp. 40-49.
Guha et al., “Multichannel Joint Rate Control of VBR MPEG Encoded Video for DBS Applications”, IEEE Transactions on Consumer Electronics, vol. 40, No. 3, Aug. 1994, pp. 6616-623.
Tes et al., “Video Aggregation: An Integrated Video Compression and Multiplexing Scheme for Broadband Networks”, 1995 IEEE, pp. 439-446.
Haskell et al., “Multiplexing of Variable Rate Encoded Streams”, IEEE Transactions on Circuits and Systems for Video Technology, vol. 4, No. 4, Aug. 1994, pp. 417-424.
Haskell et al., “Variable BIT-Rate Video Coding for ATM and Broadcast Applications”, 1993 IEEE, pp. I-114 —i116.
Hulyalkar et al., “Advanced Digital HDTV Transmission System for Terrestrial Video Simulcasting”, IEEE Journal on
Plummer Robert H.
Williams Jim C.
Crook John A.
Hughes Electronics Corporation
Sales Michael W.
Tung Bryan
LandOfFree
Video broadcast system with video data shifting does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Video broadcast system with video data shifting, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Video broadcast system with video data shifting will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2570396