Video encoder and decoder apparatus deciding error in transform coefficients between an original image and a predictive image

摘要

A video encoder apparatus using a distributed video coding (DVC) includes a Wyner-Ziv frame encoder for forming a predictive image of a Wyner-Ziv frame on the basis of coded key frames, and determining, according to the fallibility of the transform coefficients of the predictive image with respect to the transform coefficients of an original image based on the Wyner-Ziv frame, the amount of error correction codes to be transmitted so as to transmit the error correction codes corresponding to the determined amount. When no errors are found between the transform coefficients of the original image of the Wyner-Ziv frame and the predictive image, information indicating that no errors are found is sent out instead of the error correction codes for the Wyner-Ziv frame in question.

主权项

1. A video encoder apparatus using distributed video coding (DVC) to encode an input sequence including a key frame and a non-key frame with respective encoding schemes different from each other to transmit at least partially an error correction code for an encoded non-key frame to a decoder apparatus, said encoder apparatus comprising:
a key frame encoder for encoding the key frame and transmitting the encoded key frame to the decoder apparatus; and a non-key frame encoder for forming a predictive image of the non-key frame on a basis of the encoded key frame, and determining, based on a fallibility of a transform coefficient of the predictive image with respect to a transform coefficient of an original image of the inputted non-key frame, an amount of error correction codes to be transmitted to transmit the error correction codes associated with the determined amount of error correction codes, said non-key frame encoder transmitting, when no error is detected between the transform coefficients of the original image and the predictive image, information indicating no error detected, instead of the error correction code for the non-key frame.