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Primary Examiner: Safourek, Benedict V.
Assistant Examiner: Coles, Edward L.
Attorney: Sughrue, Rothwell, Mion, Zinn and Macpeak

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Title: Television signal coder

Abstract: A television signal coder of the type which makes use of correlations to compress the amount of information transmitted. n fields are selected for every m fields (m, n being positive integers; m>n), and a predicted signal level for each picture element in the n fields is represented by an interpolated value of the respective spatially corresponding picture elements in the preceding and succeeding fields. The prediction error which is the difference between the interpolated value and each corresponding picture element is coded and transmitted. The signal for the remaining (m-n) fields are coded and transmitted according to conventional coding systems.

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Inventors: Koga, Toshio (Tokyo, JP)

Application Number: 865147
Filing Date: 1977-12-28
Publication_date: 1980-05-06
Assignee: Nippon Electric Co., Ltd. (Tokyo, JP)
Primary Class(es): 348/411.1 375/247
Other Classes:
US Patent Ref:

2921124

Jan, 1960

Graham

358/133.

Other Refs: Other References: J. C. Candy et al., "Transmitting Television as Clusters of Frame-to-Frame Difference", Bell System Tech. Journal, vol. 50, No. 6, 7-8/71.