VIDEO ENCODING APPARATUS AND VIDEO ENCODING METHOD

摘要

A video encoding apparatus includes: a frame encoder which encodes a field pair by a frame coding mode and calculates a first amount of coding and a first amount of distortion; a field encoder which encodes the field pair by a field coding mode and calculates a second amount of coding and a second amount of distortion; and a coding mode determining unit which applies the first amount of coding and the first amount of distortion to a reference function representing a relationship between the amount of coding and the amount of distortion to derive a first function, applies the second amount of coding and the second amount of distortion to the reference function to derive a second function, and determines the coding mode to be applied to the field pair, based on the magnitude relationship between the first function and the second function.

主权项

1. A video encoding apparatus for encoding each field pair containing two successive fields and contained in video data conforming to an interlaced video format by either a frame coding mode in which the two fields are encoded as one frame or a field coding mode in which the two fields are encoded as separate fields, the apparatus comprising:
a frame encoder which encodes the field pair by the frame coding mode, and which calculates a first amount of coding resulting from the encoding and a first amount of distortion representing error statistics associated with the encoding; a field encoder which encodes the field pair by the field coding mode, and which calculates a second amount of coding resulting from the encoding and a second amount of distortion representing error statistics associated with the encoding; a coding mode determining unit which applies the first amount of coding and the first amount of distortion to a reference function representing a relationship between the amount of coding and the amount of distortion to derive a first function representing a relationship between the amount of coding and the amount of distortion when the field pair is encoded by the frame coding mode, applies the second amount of coding and the second amount of distortion to the reference function to derive a second function representing a relationship between the amount of coding and the amount of distortion when the field pair is encoded by the field coding mode, and selects either the frame coding mode or the field coding mode as the coding mode to be applied to the field pair, based on a magnitude relationship between the first function and the second function; and an output unit which outputs the field pair encoded by the frame coding mode or the field coding mode, whichever is selected as the coding mode to be applied.