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Image decoding device, image encoding device, image decoding method, and image encoding method

A technology of image decoding and image encoding, which is applied in the field of image decoding devices, can solve problems such as useless waiting time, and achieve the effect of reducing waiting time and improving processing efficiency

Inactive Publication Date: 2017-09-01
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, when an image decoding device decodes an image by pipeline processing, useless waiting time may occur.

Method used

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  • Image decoding device, image encoding device, image decoding method, and image encoding method
  • Image decoding device, image encoding device, image decoding method, and image encoding method
  • Image decoding device, image encoding device, image decoding method, and image encoding method

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Embodiment approach 1

[0133] (1-1. Outline)

[0134] First, the outline of the image decoding device according to the present embodiment will be described. The image decoding device according to this embodiment decodes an encoded stream that is an encoded image. The size of coding units constituting a coded stream is variable. Furthermore, the image decoding device divides a plurality of processes included in the decoding process into a plurality of stages, and performs the plurality of processes in parallel in a pipeline manner.

[0135] In this case, the image decoding device performs a plurality of processes in parallel in a pipelined manner in accordance with the size of the coding unit defined in the coded stream. Input / output buffers are connected to a plurality of processing units constituting the image decoding device. The input / output buffer is composed of a FIFO (First In First Out) section capable of holding data corresponding to at least three LCUs. In addition, the largest coding u...

Embodiment approach 2

[0247] (2-1. Outline)

[0248] First, the outline of the image decoding device according to the present embodiment will be described. The image decoding device according to this embodiment decodes an encoded stream that is an encoded image. The size of coding units constituting a coded stream is variable. Also, the image decoding device divides a plurality of processes included in the decoding process into a plurality of stages, and performs the plurality of processes in parallel in a pipeline manner.

[0249] In this case, the image decoding device performs a plurality of processes in parallel in a pipelined manner in accordance with the size of the coding unit defined in the coded stream. Input / output buffers are connected to a plurality of processing units constituting the image decoding device. The input / output buffer is composed of a FIFO unit capable of holding data corresponding to at least two maximum coding units. Also, the data of the FIFO section is managed base...

Embodiment approach 3

[0309] The image decoding device and the image encoding device according to this embodiment include characteristic components among the plurality of components described in Embodiments 1 and 2. FIG.

[0310] Figure 21A is a configuration diagram showing the image decoding device according to the present embodiment. Figure 21A The illustrated image decoding device 100 decodes an image encoded by being divided into a plurality of blocks having at least two sizes through pipeline processing including a plurality of processes. Furthermore, the image decoding device 100 includes two processing units 101 and 102 and a storage unit 111 . The storage unit 111 has a capacity capable of storing two or more blocks of the largest size among at least two sizes.

[0311] Figure 21B yes means Figure 21A A flowchart of the operation of the image decoding device 100 is shown. First, the processing unit 101 sequentially performs a first process among a plurality of processes for a plur...

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Abstract

An image decoding device decodes an encoded image divided into a plurality of blocks of at least two sizes through pipeline processing including a plurality of processes, and includes: a first storage unit (111) capable of storing at least two or more blocks; capacity of the block with the largest size among the various sizes; the first processing unit (101) sequentially performs the first processing among the multiple processings on the multiple blocks, and saves the block subjected to the first processing in the first storage part (111), thereby sequentially storing a plurality of blocks in the first storage part (111); the second processing part (102), sequentially extracting a plurality of blocks from the first storage part (111), and sequentially The second process among the plurality of processes is performed.

Description

technical field [0001] The present invention relates to an image decoding device that decodes an encoded image divided into a plurality of blocks having at least two sizes by pipeline processing including a plurality of processes. Background technique [0002] As techniques related to an image decoding device that decodes an image, there are techniques described in Patent Document 1, Non-Patent Document 1, and Non-Patent Document 2. [0003] Patent Document 1: Japanese Patent Application Laid-Open No. 9-84005 [0004] Non-Patent Document 1: Thomas Wiegand et al, "Overview of the H.264 / AVC VideoCoding Standard", IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEOTECHNOLOGY, JULY2003, PP.560-576 [0005] Non-Patent Document 2: "Working Draft3 of High-Efficiency Video Coding", [online], Joint Collaborative Team on Video Coding (JCT-VC), September 8, 2011, [Searched on September 22, 2011], Internet< URL: http: / / phenix.it-sudparis.eu / jct / doc_end_user / documents / 6_Torino / wg11 / ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/61H04N19/119H04N19/436
CPCH04N19/119H04N19/61H04N19/436G06T9/00
Inventor 天野博史田中健大贺健司
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD