VIDEO ENCODING APPARATUS, VIDEO DECODING APPARATUS, VIDEO ENCODING METHOD, VIDEO DECODING METHOD, AND COMPUTER PROGRAM

摘要

A technique is provided for high-efficiency compression of multiple video images having the same image pattern generated in different video formats. A video encoding apparatus AA that performs scalable encoding of an input video image instructs a video format converting unit to convert the input video image into a video image in another video format so as to generate a converted video image. Furthermore, an encoding-side prediction unit predicts information lost in the operation of the video format converting unit for generating the converted video image. A first encoding unit encodes the input video image using predicted results obtained by the encoding-side prediction unit. A second encoding unit encodes a video image converted by the video format converting unit. A multiplexing unit multiplexes the encoded results obtained by the first and second encoding units so as to generate a compressed stream b having video format scalability.

主权项

1. A video encoding apparatus which is capable of performing scalable encoding of an input video image, the video encoding apparatus comprising:
a video format converting unit that converts the input video image into a video image in a video format that differs from a video format of the input video image, so as to generate a converted video image; an encoding-side prediction unit that predicts information lost in an operation of the video format converting unit for generating the converted video image; a first encoding unit that encodes the input video image based on a prediction result obtained by the encoding-side prediction unit; a second encoding unit that encodes the converted video image generated by the video format converting unit; and a multiplexing unit that multiplexes an encoded result obtained by the first encoding unit and an encoded result obtained by the second encoding unit so as to generate compressed data having scalability with respect to the video format.