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Image decoding device and image decoding method

An image decoding and image technology, applied in image communication, digital video signal modification, electrical components, etc., to achieve the effect of high error resistance

Inactive Publication Date: 2014-11-26
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, the coded stream of the image may contain errors that were not considered by conventional technologies

Method used

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  • Image decoding device and image decoding method
  • Image decoding device and image decoding method
  • Image decoding device and image decoding method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0129] First, the outline of the image decoding device according to this embodiment will be described. The image decoding device according to this embodiment decodes a coded stream including prediction units coded by prediction using the prediction parameter candidate list and prediction parameter identification information.

[0130] At this time, the image decoding apparatus judges whether or not a prediction parameter candidate indicated by the prediction parameter identification information exists in the prediction parameter candidate list, and detects a state in which the prediction parameter candidate indicated by the prediction parameter identification information does not exist in the prediction parameter candidate list as an error. .

[0131] In this manner, the image decoding device can detect errors for each prediction unit, so that error resistance can be improved.

[0132] The above is the description of the outline of the image decoding device according to this e...

Embodiment 2

[0220] First, the outline of the image decoding device according to this embodiment will be described. The image decoding device according to this embodiment decodes an encoded stream including a prediction unit encoded using prediction, using a prediction parameter candidate list and prediction parameter identification information.

[0221] At this time, the image decoding apparatus judges whether or not a prediction parameter candidate indicated by the prediction parameter identification information exists in the prediction parameter candidate list, and detects a state in which no prediction parameter candidate indicated by the prediction parameter identification information is present in the prediction parameter candidate list as an error. Furthermore, the image decoding device conceals detected errors.

[0222] In this way, the image decoding device detects errors for each prediction unit and conceals the detected errors. Therefore, the image decoding device can improve e...

Embodiment 3

[0241] In this embodiment, typically, the image decoding device shown in Embodiment 1 is realized as a semiconductor integrated circuit LSI. Figure 20 Shows the form of implementation. The frame memory 502 is implemented on a DRAM, and other circuits and memories are formed on an LSI.

[0242] Each of these may be used as one chip, or some or all of them may be used as one chip. In addition, it is called system LSI here, but it is also called IC, system LSI, super LSI, and super LSI according to the degree of integration.

[0243] In addition, the method of circuit integration is not limited to LSI, and it can also be realized by a dedicated circuit or a general-purpose processor. A Field Programmable Gate Array (FPGA: Field Programmable Gate Array) that can be programmed after LSI manufacturing or a reconfigurable processor that can dynamically reconfigure the connection and settings of circuit cells inside the LSI can also be used.

[0244] In addition, if integrated cir...

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Abstract

Provided is an image decoding device for decoding the encoded stream of an image that is divided into a plurality of units. The image decoding device comprises the following: a parameter candidate generating unit (101) that uses at least one parameter used in the decoding of at least one decoded unit to generate a parameter candidate list that includes at least one parameter candidate which is a parameter candidate that is used in the decoding of the units to be decoded; a parameter information decoding unit (102) that decodes parameter information which is information included in an encoded stream and information relating to at least one parameter candidate; and an error detection unit (103) for detecting a state in which the parameter information decoded by the parameter information decoding unit (102) is not consistent with the parameter candidate list generated by the parameter candidate generating unit (101), and treating such detection as an error.

Description

technical field [0001] The present invention relates to an image decoding device that decodes an encoded stream of images divided into a plurality of units. Background technique [0002] As techniques related to an image decoding device that decodes a coded stream of an image, there are techniques described in Patent Document 1, Non-Patent Document 1, and Non-Patent Document 2. [0003] (Prior art literature) [0004] (patent documents) [0005] Patent Document 1: Japanese Patent No. 3322670 [0006] (non-patent literature) [0007] Non-Patent Document 1: ITU-T Recommendation H.264 "Advanced video coding for generic audiovisual services", March 2010 [0008] Non-Patent Document 2: "Working Draft 5 of High-Efficiency Video Coding", [online], Joint Collaborative Team on Video Coding (JCT-VC), January 20, 2012, [Searched on January 20, 2012], Internet <URL: http: / / phenix.int-evry.fr / gct / doc_end_user / documents / 7_Geneva / wg11 / JCTV C-G1103-v9.zip> [0009] Summary of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/463H04N19/176
CPCH04N19/463H04N19/196H04N19/11H04N19/136H04N19/44H04N19/65H04N19/895H04N19/521
Inventor 天野博史田中健大贺健司
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD