Method and apparatus for implementing playback features for compressed video data

Patent 5949948 Issued on September 7, 1999. Estimated Expiration Date:

November 20, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Video distribution system allowing viewer access to time staggered indentical prerecorded programs
Patent #: 5168353
Issued on: 12/01/1992
Inventor: Walker, et al.

Encoding/decoding moving images with forward and backward keyframes for forward and reverse display
Patent #: 5267334
Issued on: 11/30/1993
Inventor: Normille, et al.

Moving-picture data digital recording and reproducing apparatuses
Patent #: 5282049
Issued on: 01/25/1994
Inventor: Hatakenaka, et al.

Motion picture decoding system which affords smooth reproduction of recorded motion picture coded data in forward and reverse directions at high speed
Patent #: 5305113
Issued on: 04/19/1994
Inventor: Iwamura, et al.

Time delayed digital video system using concurrent recording and playback
Patent #: 5371551
Issued on: 12/06/1994
Inventor: Logan, et al.

Digital video recorder compatible receiver with trick play image enhancement
Patent #: 5377051
Issued on: 12/27/1994
Inventor: Lane, et al.

Television program recording and reproducing system using program data of text broadcast signal
Patent #: 5390027
Issued on: 02/14/1995
Inventor: Henmi, et al.

Data placement on tape for a digital video tape recorder suitable for high speed picture playback
Patent #: 5398143
Issued on: 03/14/1995
Inventor: Strolle, et al.

Time warping for video viewing
Patent #: 5438423
Issued on: 08/01/1995
Inventor: Lynch, et al.

Video on demand with memory accessing and or like functions
Patent #: 5442390
Issued on: 08/15/1995
Inventor: Hooper, et al.

More ...

Inventors

Assignee

Imedia Corporation

Application

No. 560732 filed on 11/20/1995

US Classes:

386/6, Fast reproducing68/110, Squeezer and bed, both movable68/125Mountings

Examiners

Primary: Casler, Brian L.
Assistant: Din, Luanne P.

Attorney, Agent or Firm

McCutchen, Doyle, Brown & Enersen,LLP

Foreign Patent References

0 396 285 A2 EP 11/13/1990
0473416 EP 03/13/1992
0620683 EP 10/13/1994
0637888 EP 02/13/1995
0 674 448 A2 EP 09/13/1995
406133268 JP 05/13/1994
406276485 JP 09/13/1994

International Class

H04N 005/76

Abstract

A compressed video playback system which eliminates playback mode transition artifacts. Transitions between various playback modes are effected in such a manner that transition artifacts are eliminated by delaying playback mode transitions until appropriate frames of data are detected for propagation to the compressed video decoder. In addition, compressed video data retrieval methods are improved for supporting multi-speed playback modes in both forward and reverse directions in an optimal manner.