Pulse or digital communications – Synchronizers – Synchronization failure prevention
Patent
1992-07-14
1996-03-05
Tse, Young T.
Pulse or digital communications
Synchronizers
Synchronization failure prevention
375366, 375369, 3701101, 370106, 3701051, 371 30, H04J 306, H04L 700, H04L 2538
Patent
active
054974046
ABSTRACT:
A succession of variable length data packets containing a header portion and data portion are received. Selected data from the data packet headers is stored in designated locations of a header memory. A data packet start address is provided with each stored header portion to designate a location in a data memory for commencing the storage of data contained in a corresponding data packet. The data from the received data packets is stored commencing in the data memory locations designated by the corresponding data packet start addresses. In an illustrated embodiment, the data packets are macroblocks from digitized television frames. A plurality of next data packet position indicators are provided in the data, for use in periodically verifying macroblock boundaries during the receipt of the television data and to provide a rapid recovery from a transmission error affecting the actual or identified length of a macroblock.
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W. Paik, "DigiCipher--All Digital, Channel Compatible, HDTV Broadcast System," IEEE Transactions on Broadcasting, vol. 36, No. 4, Dec. 1990.
M. Yoneda, et al., "An Experimental Digital VCR with New DCT-Based Bit-Rate Reduction System," IEEE Transactions on Consumer Electronics, vol. 37, No. 3, Aug., 1991, New York, U.S.A., pp. 275-282.
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Excerpt from internal, unpublished, restricted distribution Document No. HDVT-090-008, "DigiCipher NTSC Prototype (Preliminary)," General Instrument Corporation, Jun. 11, 1990.
Grover Glen A.
Moroney Paul
General Instrument Corporation
Lipsitz Barry R.
Luther William
Tse Young T.
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