US Patent Application No: 2005/0105,486

Number of patents in Portfolio can not be more than 2000

Bandwidth optimization of video program bearing transport streams

ALSO PUBLISHED AS: 7620073

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Abstract

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A method and system are provided for remultiplexing program bearing data. The remultiplexing method and system are applicable to MPEG-2 compliant transport streams carrying video programs. A descriptor based system is used for scheduling the timely output of transport packets wherein each descriptor records a dispatch time as well as a receipt time for each transport packet. The receipt time is used for estimating program clock reference adjustments, but final program clock reference adjustment is performed in hardware in relation to the precise output timing of each transport packets. A descriptor and transport packet caching technique is used for decoupling the synchronous receipt and transmission of transport packets from any asynchronous processing performed thereon. The descriptors can also be used for managing scrambling and descrambling control words (encryption and decryption keys). Remultiplexing functions may be distributed across a network. The remultiplexer can furthermore optimize the bandwidth of transport streams by replacing null transport packets with transport packet data to be inserted into the output transport stream. Program data transmitted via asynchronous communication links is re-timed and assistance is provided for outputting program data on such asynchronous communication links to reduce a variation in end-to-end delay incurred by the program data. Remultiplexing and program specific information can be seamlessly dynamically varied without stopping, or introducing a discontinuity in, the flow of outputted transport packets. A technique is also provided for locking multiple internal reference clock generators.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
TANDBERG TELEVISION, INC.DULUTH, GA5

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gratacap, Regis Mill Valley, CA 15 707
Robinett, Robert Menlo Park, CA 10 311

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
BROADCOM CORPORATION (2)
7,120,203 Dual link DVI transmitter serviced by single Phase Locked Loop 3 2002
7,254,183 Dual link DVI transmitter serviced by single phase locked loop 0 2006
 
INTEL CORPORATION (1)
7,426,610 On-device packet descriptor cache 1 2005
 
NAGRAVISION S.A. (1)
8,175,072 Process for the generation of packets for at least one mobile receiver 0 2007
 
PATOIS TELECOM LIMITED LIABILITY COMPANY (1)
7,953,880 Content-aware adaptive packet transmission 2 2006
 
SCIENTIFIC-ATLANTA, LLC (1)
7,720,987 Mapping transport streams 0 2008
 
SHARP KABUSHIKI KAISHA (1)
7,668,170 Adaptive packet transmission with explicit deadline adjustment 3 2007
 
SONY UNITED KINGDOM LIMITED (1)
7,394,834 Common interface controller and method of descrambling transport stream channels 2 2004
 
TVWORKS, LLC (1)
8,046,792 Multi-channel audio enhancement for television 0 2002

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