Video data processing device and method

Patent metadata

Field	Value
Publication number	US-2016134875-A1
Application number	US-201514920387-A
Country	US
Kind code	A1
Filing date	Oct 22, 2015
Priority date	Nov 12, 2014
Publication date	May 12, 2016
Grant date	—

Abstract

A video data processing device includes: a processor; and a memory which stores a plurality of instructions, which when executed by the processor, cause the processor to execute: making, on the basis of first key frames obtained by encoding images in frames included in moving image data, difference frames in each of which a partial image different from an image in a frame corresponding to each first key frame is encoded; and generating, if the number of generated difference frames reaches a first number, in response to detection that a difference between a difference frame generated thereafter and a difference frame preceding in time to the difference frame generated thereafter is not larger than a given value, a second key frame distinguished from the first key frames and obtained by encoding an image in the frame.

First claim

What is claimed is:

1 . A video data processing device, comprising:
a processor; and a memory which stores a plurality of instructions, which when executed by the processor, cause the processor to execute: making, on the basis of first key frames obtained by encoding images in frames included in moving image data, difference frames in each of which a partial image different from an image in a frame corresponding to each first key frame is encoded; and generating, if the number of generated difference frames reaches a first number, in response to detection that a difference between a difference frame generated thereafter and a difference frame preceding in time to the difference frame generated thereafter is not larger than a given value, a second key frame distinguished from the first key frames and obtained by encoding an image in the frame.

2 . The device according to claim 1 ,
wherein the second key frame is a frame indicative of a delimiter for a frame set for which encoding of the moving image data is to be performed.

3 . The device according to claim 1 ,
wherein the generating further executes a process of generating a next frame as the second key frame when a second number of the difference frames greater than the first number are generated without generation of the second key frame.

4 . The device according to claim 1 ,
wherein the generating successively applies a sequence number to each of the different frames, returns the sequence number to an initial value when the second key frame is generated, and successively applies a sequence number beginning with the initial value to each of difference frames following the second key frame.

5 . The device according to claim 1 ,
wherein the generating further executes, when detecting that the number of the generated difference frames reaches the first number and the images in the frames corresponding to the difference frames are flat, a process of generating the second key frame distinguished from the first key frame and obtained by encoding an image in the frame.

6 . A video data processing method, comprising:
making, by a computer processor, on the basis of first key frames obtained by encoding images in frames included in moving image data, difference frames in each of which a partial image different from an image in a frame corresponding to each first key frame is encoded; and generating, if the number of generated difference frames reaches a first number, in response to detection that a difference between a difference frame generated thereafter and a difference frame preceding in time to the difference frame generated thereafter is not larger than a given value, a second key frame distinguished from the first key frames and obtained by encoding an image in the frame.

7 . The method according to claim 6 ,
wherein the second key frame is a frame indicative of a delimiter for a frame set for which encoding of the moving image data is to be performed.

8 . The method according to claim 6 ,
wherein the generating further executes a process of generating a next frame as the second key frame when a second number of the difference frames greater than the first number are generated without generation of the second key frame.

9 . The method according to claim 6 ,
wherein the generating successively applies a sequence number to each of the different frames, returns the sequence number to an initial value when the second key frame is generated, and successively applies a sequence number beginning with the initial value to each of difference frames following the second key frame.

10 . The method according to claim 6 ,
wherein the generating further executes, when detecting that the number of the generated difference frames reaches the first number and the images in the frames corresponding to the difference frames are flat, a process of generating the second key frame distinguished from the first key frame and obtained by encoding an image in the frame.

Assignees

• Fujitsu Ltd

Inventors

• Yamaguchi Yousuke
• Kobayashi Shunsuke
• Yamashita Kazuhiro
• Misuda Yasuo

Classifications

• H04N19/152

  by measuring the fullness of the transmission buffer · 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

• H04N19/172 Primary

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