Encoding apparatus, encoding method and program

Patent metadata

Field	Value
Publication number	US-10271056-B2
Application number	US-201715602531-A
Country	US
Kind code	B2
Filing date	May 23, 2017
Priority date	Oct 24, 2011
Publication date	Apr 23, 2019
Grant date	Apr 23, 2019

Abstract

There is provided an encoding apparatus, including an intra-block determination section which determines that a prediction mode of a block is a forced intra-prediction mode, by a frequency based on a priority of each block of an image to be encoded, an encoding section which encodes the block, to which the prediction mode has been determined to be an intra-prediction mode by the intra-block determination section, with the intra-prediction mode, and a transmission section which transmits an encoded result of the image to be encoded obtained by the encoding section, and the prediction mode of the image.

First claim

What is claimed is:

1. An encoding apparatus, comprising:
an encoding section which encodes a block of a region, for which a prediction mode has been determined to be an intra-prediction mode based on an update frequency of the region in an image to be encoded, with the intra-prediction mode, wherein the update frequency of the region is based on a degree of importance of the region in the image; and
a transmission section which transmits an encoded result of the image to be encoded obtained by the encoding section, and the prediction mode of the image.

2. The encoding apparatus according to claim 1 , further comprising:
an intra-block determination section which determines that the prediction mode of the block is the intra-prediction mode based on the update frequency.

3. The encoding apparatus according to claim 2 ,
wherein the intra-block determination section determines that the prediction mode of the block of the region with the high update frequency is the intra-prediction mode.

4. The encoding apparatus according to claim 3 ,
wherein the intra-block determination section determines that the prediction mode of the block of the region with the high update frequency is the intra-prediction mode according to a type of the image to be encoded.

5. The encoding apparatus according to claim 3 ,
wherein the region with the high update frequency is an observed region of a user.

6. The encoding apparatus according to claim 2 ,
wherein the intra-block determination section determines that the prediction mode of the block of the region is the intra-prediction mode by a frequency based on a high update frequency.

7. The encoding apparatus according to claim 6 ,
wherein the frequency is the frequency of a frame of the image to be encoded which includes a block, for which the prediction mode has been determined to be the intra-prediction mode.

8. An encoding method of an encoding apparatus comprising:
encoding a block of a region, for which a prediction mode has been determined to be an intra-prediction mode based on an update frequency of the region in an image to be encoded, with the intra-prediction mode, wherein the update frequency of the region is based on a degree of importance of the region in the image; and
transmitting an encoded result of the image to be encoded and the prediction mode of the image.

9. A decoding apparatus, comprising:
an decoding section which decodes an encoded stream, for which a prediction mode of a block has been determined to be an intra-prediction mode based on a priority of each block in an image to be decoded, with the intra-prediction mode,
wherein the priority is determined to increase in the block of the region with a high update frequency in the image to be decoded and wherein the update frequency of the region is based on a degree of importance of the region in the image; and
an output section which outputs a decoded result of the image to be decoded obtained by the decoding section.

10. The decoding apparatus according to claim 9 ,
wherein the priority is determined to increase in the block of the region with a high update frequency in the image to be encoded according to a type of the image to be encoded.

11. A decoding method of a decoding apparatus, comprising:
decoding an encoded stream, for which a prediction mode of a block has been determined to be an intra-prediction mode based on a priority of each block in an image to be decoded, with the intra-prediction mode,
wherein the priority is determined to increase in the block of the region with a high update frequency in the image to be decoded and wherein the update frequency of the region is based on a degree of importance of the region in the image; and
outputting a decoded result of the image to be decoded.

Assignees

• Sony Corp
• Sony Interactive Entertainment Inc

Inventors

• Miyahara Nobuyoshi
• Ando Yuji
• Okada Ryohei
• Ota Osamu

Classifications

• H04N19/172 Primary

  the region being a picture, frame or field · CPC title

• H04N19/137

  Motion inside a coding unit, e.g. average field, frame or block difference · CPC title

• H04N19/107

  between spatial and temporal predictive coding, e.g. picture refresh · CPC title

• H04N19/179

  the unit being a scene or a shot · CPC title

• H04N19/167 Primary

  Position within a video image, e.g. region of interest [ROI] · CPC title