System for transmitting and/or storing signals corresponding to textured pictures
First Claim
1. Apparatus for transmitting a video picture which is received at an input of said apparatus in the form of digital signals corresponding to the luminosities of pixels of said video picture, blocks of said signals constituting texture signals representative of textures in said video picture formed by the corresponding blocks of pixels;
- said apparatus comprising;
a sampling stage coupled to said input for deriving a reference sample of the texture signals relating to an area of the video picture having substantially homogeneous texture, said reference sample including data blocks representative of blocks of pixels in a sample of said area of the video picture;
a first coding stage coupled to said sampling stage for encoding said reference sample of the texture signals relating to said area of the video picture so as to form a coded reference sample signal;
a second coding stage coupled to said input for encoding the texture signals relating to said video picture so as to form coded texture signals;
a transmission medium coupled to said first and second coding stages for transmitting the coded reference sample signal and the coded texture signals, said transmission medium comprising at least one of a communication channel and storage means;
decoding means coupled to said transmission medium for receiving therefrom the transmitted coded reference sample signal and the coded texture signals, and decoding said signals to derive a decoded reference sample signal and decoded texture signals; and
picture synthesizing means coupled to said decoding means for (i) combining the decoded texture signals to derive an approximative synthesis of the video picture, and (ii) extrapolating said approximative synthesis of the video picture by replacing pixels in said area of substantially homogeneous texture with pixel blocks represented by the decoded reference sample signal, thereby completing synthesis of the video picture.
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Abstract
Device for transmitting and/or storing signals presented thereto representing the textures of different areas of a video picture. The device includes a sampling stage for deriving a reference sample of the texture signals from a given picture area, and a coding stage for coding the reference sample signal as well as area signals representative of texture over the entire area from which the sample has been taken. The coded output signals of the coding stage may be transmitted by a transmission medium such as a communication channel and/or a store. A decoding stage then decodes the coded signals, and a texture synthesis stage uses the decoded sample signals to enhance the decoded area signals, thereby effectively achieving synthesis of a reproduction of the relevant picture area having a texture closely resembling the texture of such area of the original picture.
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Citations
9 Claims
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1. Apparatus for transmitting a video picture which is received at an input of said apparatus in the form of digital signals corresponding to the luminosities of pixels of said video picture, blocks of said signals constituting texture signals representative of textures in said video picture formed by the corresponding blocks of pixels;
- said apparatus comprising;
a sampling stage coupled to said input for deriving a reference sample of the texture signals relating to an area of the video picture having substantially homogeneous texture, said reference sample including data blocks representative of blocks of pixels in a sample of said area of the video picture; a first coding stage coupled to said sampling stage for encoding said reference sample of the texture signals relating to said area of the video picture so as to form a coded reference sample signal; a second coding stage coupled to said input for encoding the texture signals relating to said video picture so as to form coded texture signals; a transmission medium coupled to said first and second coding stages for transmitting the coded reference sample signal and the coded texture signals, said transmission medium comprising at least one of a communication channel and storage means; decoding means coupled to said transmission medium for receiving therefrom the transmitted coded reference sample signal and the coded texture signals, and decoding said signals to derive a decoded reference sample signal and decoded texture signals; and picture synthesizing means coupled to said decoding means for (i) combining the decoded texture signals to derive an approximative synthesis of the video picture, and (ii) extrapolating said approximative synthesis of the video picture by replacing pixels in said area of substantially homogeneous texture with pixel blocks represented by the decoded reference sample signal, thereby completing synthesis of the video picture. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- said apparatus comprising;
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9. A system for transmitting a video picture in the form of digital signals which include texture signals and reference sample signals, the texture signals representing textures in the video picture, the reference sample signals representing texture in samples of areas of said picture of respectively different substantially homogeneous textures;
- the signals being transmitted via a transmission medium, decoded upon reception from said transmission medium, and the decoded signals being supplied to picture synthesizing apparatus for deriving a synthesis of the video picture therefrom;
characterized in that said picture synthesizing apparatus comprises;a dictionary-forming circuit for storing a dictionary of data blocks included in each of the decoded reference sample signals, each data block including data representative of a block of pixels in the sample of the relevant area of the video picture, each data block being indexed to indicate the positions of the pixels represented thereby in said area of the video picture; and a texture extrapolation circuit for (i) combining the decoded texture area signals so as to form an approximative synthesis of the video picture, and (ii) extrapolating said approximative synthesis by replacing pixels represented by decoded texture signals with pixels represented by data blocks in said dictionary;
the pixels represented by the data blocks in said dictionary being positioned in the synthesized video picture in accordance with the indexing in said dictionary.
- the signals being transmitted via a transmission medium, decoded upon reception from said transmission medium, and the decoded signals being supplied to picture synthesizing apparatus for deriving a synthesis of the video picture therefrom;
Specification