Picture coding apparatus and method thereof
First Claim
1. A hierarchical picture coding method for coding a plurality of hierarchical data having a plurality of different resolutions and transmitting the coded data, comprising the steps of:
- generating a plurality of hierarchical data having a plurality of different resolutions;
detecting an activity of a predetermined block of each hierarchical data, controlling a division of a block corresponding to said predetermined block based on said activity, and generating a flag showing said control of the division;
coding said each hierarchical data; and
transmitting a hierarchical data having the lowest resolution and said flag and then transmitting each hierarchical data except for said hierarchical data having the lowest resolution.
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Abstract
In a picture coding apparatus and a picture coding method, when a picture data is hierarchically coded, compression efficiency can be improved, and the deterioration of picture quality can be reduced. When a picture data is hierarchically coded by utilizing a recursive hierarchical representation, adaptive division of block is performed corresponding to the characteristic of the picture data and then coding is performed, and thus obtained hierarchical coded data is transmitted, so that the block of the lower hierarchy can be adaptively divided, thereby the information quantity such as a plane portion of picture can be reduced.
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Citations
7 Claims
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1. A hierarchical picture coding method for coding a plurality of hierarchical data having a plurality of different resolutions and transmitting the coded data, comprising the steps of:
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generating a plurality of hierarchical data having a plurality of different resolutions;
detecting an activity of a predetermined block of each hierarchical data, controlling a division of a block corresponding to said predetermined block based on said activity, and generating a flag showing said control of the division;
coding said each hierarchical data; and
transmitting a hierarchical data having the lowest resolution and said flag and then transmitting each hierarchical data except for said hierarchical data having the lowest resolution. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification