Methods for monitoring and modifying a trick play data stream to

Details Methods for monitoring and modifying a trick play data stream to Methods for monitoring and modifying a trick play data stream to

1995-06-07

1998-08-11

Than, Thai

Motion video signal processing for recording or reproducing

Local trick play processing

With randomly accessible medium

386111, 348423, H04N 5783

Patent

active

057939276

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: 5543932 (1996-08-01), Change et al.
patent: 5566174 (1996-10-01), Sato et al.
patent: 5568274 (1996-10-01), Fujinami et al.
patent: 5576902 (1996-11-01), Lane et al.
patent: 5598352 (1997-01-01), Rosenau et al.
International Standards Organization--Moving Picture Experts Group, Drafts of Recommendation H.262, ISO/IEC 13818-1, Nov. 1993.
International Standards Organization--Moving Picture Experts Group, Drafts of Recommendation H.262, ISO/IEC 13818-2, Nov. 1993.

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