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EP0637888A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Code recording apparatus

Assignee: Victor Company of Japan Ltd
•
Filing: 1994-08-03
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Granted: —
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Expires: 2014-08-03
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Abstract

Abstract The disclosed code recording apparatus can record broadcasted interframe prediction-coded code trains on a storage medium in such a way that pictorial images of smooth motion can be reproduced from the storage medium at a high speed search. When the code trains of high efficiently coded moving pictorial images are broadcasted, the prediction code trains prediction-coded between frames or fields are decoded by a decoding circuit to obtain reproduced images. The obtained reproduced images are coded independently in frame or field to form independent code trains decodable independently. Further, a part of the prediction code train is replaced with the independent code train obtained by the coding circuit by a code replacing circuit. The code trains thus obtained are recorded in the storage medium.

Inventors

  • 👤 Kenji Sugiyama

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-03 05:01
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/92; H04N21/00; H04N21/20; H04N21/23; H04N21/236; H04N19/00; H04N19/40; H04N19/50; H04N21/40; H04N21/43; H04N21/434; H04N5/78; H04N5/782; H04N5/783; H04N5/926; H04N5/9261; H04N5/9262

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 74 words
A code recording apparatus for recording code trains of high efficiently coded moving pictorial images, comprising: decoding means for decoding prediction code trains prediction-coded between frames or fields, to obtain reproduced images; coding means for coding the reproduced images independently in frame or field, to form independent code trains decodable independently; and code replacing means for replacing a part of the prediction code train with the independent code train obtained by the coding means.
Claim 2
Dependent Claim 46 words
The code recording apparatus of claim 1, wherein when the prediction code train includes bidirectional prediction code trains and one-way prediction code trains, the code replacing means replaces only the code trains coded on the basis of the one-way direction with the independent code trains, respectively.
Claim 3
Dependent Claim 46 words
The code recording apparatus of claim 1, wherein the code replacing means replaces a part of the prediction code train with the independent code train in such a way that start points of the independent code trains exist periodically at intervals of a predetermined code quantity.
Claim 4
Dependent Claim 165 words
The code recording apparatus of claim 1, wherein the code replacing means comprises: delaying means for delaying the prediction code train to synchronize the delayed prediction code train with the independent code train; selecting and outputting means for selectively outputting the delayed prediction code train and the independent code train for each frame or field; absorbing means responsive to the code trains outputted by the selecting and outputting means, for absorbing change in code quantity generated when the code trains are selected and outputted; detecting means responsive to the delayed prediction code trains, for detecting an end of a frame or a field to output a first detection signal; counting means for counting the code quantity of the code train given to the absorbing means and outputting a second detection signal when the counted code quantity reaches a predetermined code quantity; and control means for outputting a control signal to the selecting and outputting means, when the first and second detection signals are given simultaneously.

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