Video encoding/decoding method and apparatus
OwnerTakeshi Chujoh, Shinichiro Koto +1inventors
InventorsTakeshi Chujoh, Shinichiro Koto, Yoshihiro Kikuchi
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Abstract
A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.
Claims9
A video decoding method comprising;
- decoding encoded data including (a) a prediction error signal representing an error of a prediction image signal with respect to a video signal having a luminance signal and two color difference signals, (b) motion vector information, and (c) index information indicating combination of at least one reference picture number and a predictive parameter prepared for each of the luminance signal and the two color difference signals;
- generating a prediction picture signal in accordance with the reference picture number and predictive parameter of combination indicated by the decoded index information;
- and
- generating a reconstructed video signal by using the prediction error signal and the prediction signal.
A video decoding apparatus comprising;
- a decoding unit configured to decode encoded data including (a) a prediction error signal representing an error of a prediction image signal with respect to a video signal having a luminance signal and two color difference signals, motion vector information, and (b) index information representing combination of at least one reference picture number and a predictive parameter prepared for each of the luminance signal and the two color difference signals;
- a generating unit configured to generate a prediction picture signal in accordance with the reference picture number and predictive parameter of combination indicated by the decoded index information;
- and
- a generating unit configured to generate a reconstructed video signal by using the prediction error signal and the prediction signal.
A computer readable storage medium storing instructions of a computer program which when executed by a computer results in performance of steps comprising:
- decoding encoded data including (a) a prediction error signal representing an error of a prediction image signal with respect to a video signal having a luminance signal and two color difference signals, (b) motion vector information, and (c) index information representing combination of at least one reference picture number and a predictive parameter prepared for each of the luminance signal and the two color difference signals;
- generating a prediction picture signal in accordance with the reference picture number and predictive parameter of combination indicated by the decoded index information;
- and
- generating a reconstructed video signal by using the prediction error signal and the prediction signal.
Dependencies are inferred from the claim text.