Multiplexing method and recording medium

Abstract

There is provided a multiplexing method facilitating reproduction process and reducing uncomfortable feeling of a viewer from the image quality. The multiplexing method includes: a step (S100) for judging a clip to be encoded is to be encoded as a part of continuous reproduction unit configured in such a way that a plurality of encoded streams can be continuously reproduced; a step (S110) for deciding a common color space within the continuous reproduction unit for the clip to be encoded if the clip has bee judged to be encoded as a part of the continuous reproduction unit; a step (S112) for encoding the clip to be encoded according tot he decided color space so as to generate an encoded stream; and a step (S118) for packet-multiplexing the encoded stream.

Description

technical field [0001] The present invention relates to a multiplexing method for multiplexing an encoded stream generated by encoding a moving image, and a recording medium for recording the multiplexed encoded stream including Information about color spaces. Background technique [0002] According to the MPEG (Moving Picture Experts Group: Moving Picture Experts Group)-2 standard, an international standard for moving picture coding, information about the color space of moving picture signals (hereinafter referred to as color space information) can be described in the sequence display extension section. ) (Non-Patent Document 1). Also, in the MPEG-4 AVC standard, color space information can be described in a video usability information section in a sequence parameter set (Non-Patent Document 2). Here, the color space information represents, for example, color bases (colour_primaries), transfer characteristics (transfer_characteristics), and matrix coefficients (matrix_coe...

AI Technical Summary

Problems solved by technology

[0009] However, in the case of reproducing a video sequence encoded and multiplexed according to the conventional multiplexing method, there is such a problem that the reproduction process becomes complicated, or the viewer's perception of the reproduced video becomes difficult. The picture quality produces a sense of incongruity subjectively

As a result, for example, in the case of converting a moving image signal in YUV format obtained by decoding a moving image encoded by the MPEG-2 standard or the MPEG-4 AVC standard into a moving image signal in RGB format, there will be a problem that , when continuously reproducing video sequences with different color space definitions, if switching is performed, it will bring about complex reproduction processing as described above and subjectively produce a sense of incongruity in image quality

In other words, it is necessary to instantly change the processing method (color conversion method) of the color conversion process (conversion from YUV format to RGB format) when switching the video sequence, so the reproduction process becomes complicated

Moreover, since the color space of the preceding and following moving image sequences is different when switching the moving image sequence, it gives the user a subjective sense of incongruity in the image quality.

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