Methods for monitoring a trick play data stream to insure MPEG c

Details Methods for monitoring a trick play data stream to insure MPEG c Methods for monitoring a trick play data stream to insure MPEG c

1996-11-15

1998-04-14

Tran, Thai

Motion video signal processing for recording or reproducing

Local trick play processing

With randomly accessible medium

386 81, 386111, H04N 5783

Patent

active

057403074

ABSTRACT:
Methods and apparatus for insuring that a trick play data stream, e.g., a stream of data used for fast forward or reverse playback operation, complies with preselected data standards and in particular the MPEG-2 standard are disclosed. Various methods are described for generating PCR, PTS and DTS values for a trick play data stream, which is generated from a normal play data steam, and is intended for recording in trick play segments of a tape. The described methods include generating new PCR, PTS and DTS values as a function of the trick play speed at which the data is intended to be read back. Methods and apparatus for correcting PCR, PTS and DTS values read from a tape during trick playback operation are also disclosed. The disclosed methods are directed to generating new PCRs, PTSs and DTSs to provide am MPEG-2 compliant bitstream. The described methods and apparatus are applicable to a plurality of storage and playback devices capable of implementing trick play including compact disks.

REFERENCES:
patent: 5467342 (1995-11-01), Logston et al.
patent: 5521927 (1996-05-01), Kim et al.
patent: 5535008 (1996-07-01), Yamagishi et al.
patent: 5598352 (1997-01-01), Rosenau et al.
International Standards Organization -Moving Picture Experts Group, DRafts of Recommendation H.262, ISO/IEC, 138-18-1, Nov. 1993.
International Standards Organization -Moving Picture Experts Group, Drafts of Recommendation H.262, ISO/IEC 13818-2, Nov. 1993.

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