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EP0474388A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Moving picture coding apparatus

Assignee: Panasonic Holdings Corp
•
Filing: 1991-08-16
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Granted: —
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Expires: 2011-08-16
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Abstract

Abstract A moving picture coding apparatus is disclosed in which when an input image and the image of the preceding image are correlated to each other, the inter-frame coding is effected, while when no correlation exists, the intra-frame coding is carried out for packet switched networks. The moving picture coding apparatus is comprised of a device (36) for refreshing blocks in a frame at regular intervals of time, and when the number of cells generated by coding during a predetermined past time is larger than a threshold level set in advance, the number of blocks refreshed is reduced, thereby preventing the image information more than a maximum transmission capacity of the packet switched networks from being generated.

Inventors

  • 👤 Tomoyuki Tsurube

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-07 06:15
CPC Classifications
H; H04; H04N; H04N19/00; H04N19/10; H04N19/134; H04N19/136; H04N19/102; H04N19/103; H04N19/107; H04N19/124; H04N19/169; H04N19/17; H04N19/176; H04N19/50; H04N19/503; H04N19/60; H04N19/61; H04N19/146; H04N19/152

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 85 words
A moving picture coding apparatus comprising means (41) for subjecting an input image to selected one of inter-frame and intra-frame codings, means (40) for generating cells by dividing a code into a predetermined length, means (36b) for comparing the amount of cells generated by coding during a predetermined length of past time with a threshold level set in advance, and means (36a) for reducing the amount of blocks for periodic and forcible intra-frame coding when the amount of cells is more than the threshold level.
Claim 2
Dependent Claim 45 words
A moving picture coding apparatus according to Claim 1, further comprising means (37) for deciding the correlationship between an input image and the preceding frame, wherein the inter-frame coding is effected when a correlationship exists, and the intra-frame is carried out when no correlationship exists.
Claim 3
Dependent Claim 31 words
A moving picture coding apparatus according to Claim 1, wherein the means for generating cells includes means (40d) for counting the amount of cells generated during a predetermined period of time.
Claim 4
Dependent Claim 31 words
A moving picture coding apparatus according to Claim 1, wherein a plurality of threshold levels are set in advance and the blocks are reduced by different numbers for different threshold levels.

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