Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for realizing decoding, software decoder and decoding device

A hardware decoder and decoder technology, applied in the field of communication, can solve the problems of unfavorable decoding efficiency, waiting for hardware decoders, software decoders and hardware decoders to not reach full parallelism, etc., so as to improve decoding efficiency and realize parallel processing. Effect

Inactive Publication Date: 2012-08-08
李晶晶
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] During the research and practice of the prior art, the inventors of the present invention have found that the software decoder and the hardware decoder have not been completely parallel in the prior art, and when the decoding time of the software decoder is less than the decoding time of the hardware decoder, There will be a situation where the software decoder waits for the hardware decoder. On the contrary, when the decoding time of the hardware decoder is shorter than the decoding time of the software decoder, the hardware decoder will wait for the software decoder, which is not conducive to improving the decoding efficiency.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for realizing decoding, software decoder and decoding device
  • Method for realizing decoding, software decoder and decoding device
  • Method for realizing decoding, software decoder and decoding device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This embodiment will be described from the perspective of a software decoder. The software decoder is used to implement functions such as software decoding and software driving the hardware decoder, while the hardware decoder implements the hardware decoding function.

[0030] A decoding implementation method, such as figure 1 As shown, the specific process can be as follows:

[0031] 101. Perform primary processing on the acquired coded image frame; the primary processing specifically includes: performing software decoding on the acquired encoded image, using a virtual frame memory to simulate a DPB operation after hardware decoding, and obtaining a result of the DPB operation.

[0032] For example, in order to make the division of labor between software decoding and hardware decoding more reasonable, the slice header (slice header) that requires a lot of logical operations can be handed over to the software decoder for decoding, and the data-intensive slice data (sli...

Embodiment 2

[0051] According to the method described in the first embodiment, this embodiment will take the software decoder to parse the slice header, the hardware decoder to decode the slice data, and the code stream to be an H.264 code stream as an example for further description.

[0052] After parsing the slice header, the software decoder generates a decoded message, then buffers the slice data into the decoded message, uses the virtual frame memory to simulate the DPB operation after a frame ends, and caches the result of the DPB operation in the decoded message. Before starting the hardware decoder to decode each frame of encoded image, the software decoder applies for the actual frame memory according to the decoding message, and updates the virtual frame memory mapping table that records the mapping relationship between the virtual frame memory and the actual frame memory, and then Configure and start the hardware decoder with data and virtual frame memory mapping table to perfor...

Embodiment 3

[0070] According to the method described in the second embodiment, a specific example will be used to describe in detail below.

[0071] see Figure 3a , Figure 3a is a schematic diagram of the code stream. Generally, in the code stream, the image of the next frame refers to the image of the previous frame, and the number of reference frames is 1. For example, Figure 3a Include three frames of images: 1, 2 and 3, then 1 has no reference frame, 1 is the reference frame of 2, 2 is the reference frame of 3, and so on if there are other frames later.

[0072] In this embodiment, the recording of the mapping relationship between the virtual frame memory and the actual frame memory in the virtual frame memory mapping table is taken as an example for description. Wherein, the structure of the virtual frame memory mapping table may be specifically shown in Table 1;

[0073] Table I:

[0074] VFB

RFB

Remark

0

Actual frame memory information (addres...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for realizing decoding, a software decoder and a decoding device. When used for decoding an encoded image, the software decoder of the embodiment of the invention adopts virtual frame storage to imitate DPB operation of a hardware decoder after decoding the encoded image of a frame to ensure that the encoded image of the next frame can be decoded without waiting the finish of the decoding of the hardware decoder so as to avoid the situations that the software decoder and the hardware decoder wait for each other because the DPB operation is performed only afterthe finish of the decoding of the hardware decoder in the prior art. The method, the software decoder and the decoding device can well realize parallel processing of the software decoder and the hardware decoder, and improve the decoding efficiency.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a decoding implementation method, a software decoder and a decoding device. Background technique [0002] With the continuous increase of communication bandwidth, people's demand for communication is also constantly enriched. After voice, video transmission has become a new bright spot in the field of communication. In order to make video transmission easier, video compression technology also appears. H.264 is one of a kind. After the compressed video arrives at the terminal, it needs to be decoded before it can be played. In order to improve the decoding speed, the H.264 decoder architecture of the embedded central processing unit (CPU, Central Processing Unit) combined with the dedicated decoding acceleration unit is generally used at present. Decoding, wherein the acceleration unit is generally Digital Signal Processing (DSP, Digital Signal Processing) or Application S...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/26H04N19/44
Inventor 曹国栋闫智伟顾骧
Owner 李晶晶
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com