EP0498616A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Video signal encoder

Assignee: Panasonic Holdings Corp

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Filing: 1992-02-04

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Granted: —

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Expires: 2012-02-04

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Abstract

Abstract In an encoder for selectively receiving, blocking and coding by orthogonal transformation an image A with a screen aspect ratio of greater than 4:3 or an image B with a screen aspect ratio of 4:3, when the image A is entered, it is divided into a basic screen with an aspect ratio of 4:3 corresponding to a central portion of a screen and an additional screen other than the basic screen. Coding is controlled so that a sum of coded data quantity of a specified number of blocks m of orthogonal transformation of the basic screen and a specified number of blocks n of orthogonal transformation of the additional screen is within a specified data quantity x. When the image B is entered, the coding is controlled so that a coded data quantity of the same number of blocks of orthogonal transformation as the specified number of blocks of orthogonal transformation m of the basic screen of the image A is within the same data quantity as the specified data quantity x.

Inventors

👤 Masakazu Nishino
👤 Tatsuro Juri
👤 Hideki Ohtaka

Bibliographic Details

Application Number —

Jurisdiction EP

Data Source google_patents

Last Synchronized 2026-10-29 00:33

CPC Classifications

H; H04; H04N; H04N19/00; H04N19/10; H04N19/169; H04N7/00; H04N7/015; H04N19/102; H04N19/115; H04N19/124; H04N19/134; H04N19/146; H04N19/149; H04N19/17; H04N19/176; H04N19/30

Claims Analysis

Total Claims: 1

Claim 1

Independent Claim 205 words

A video signal encoder which is capable of selectively receiving an image A with a screen aspect ratio of larger than 4:3 and an image B with a screen aspect ratio of 4:3, and blocking and coding a received image by orthogonal transformation, comprising: means for dividing the image A into a basic screen with the aspect ratio of 4:3 corresponding to a central portion of a screen and an additional screen other than the basic screen; control means for controlling a coding so that a sum of coded data quantity of a specified number of orthogonal transformation blocks m of the basic screen and a specified number of orthogonal transformation blocks n of the additional screen is within a specified data quantity x when the image A is entered, and for controlling the coding so that a coded data quantity of the same number of orthogonal transformation blocks as the specified number of the orthogonal transformation blocks m of the basic screen of the image A is within the same data quantity as the specified data quantity x when the image B is entered; and coding means for coding orthogonal transformation data of the image A or image B depending on the control means.

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