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Soft decoding method for image data

An image data, soft decoding technology, applied in image communication, electrical components, etc., can solve problems such as occupying a lot of CPU time and memory, unable to upgrade file formats, increasing hardware costs, etc., to reduce processing time, save space, and improve computing. The effect of efficiency

Inactive Publication Date: 2010-09-08
FUJIAN NEWLAND COMM SCI TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Although the implementation of hardware decoding is simple and fast, the disadvantage is that the cost of hardware needs to be increased, and it cannot be upgraded to support more file formats in the future
However, general software decoding needs a lot of CPU time and memory, which is difficult to implement.

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  • Soft decoding method for image data
  • Soft decoding method for image data

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Embodiment Construction

[0015] A kind of soft decoding method of image data of the present invention comprises:

[0016] 1. If figure 1 As shown, three processes of file reading process, image data decoding process and image display process are created, and the three processes are synchronized through the multi-task scheduling and inter-task communication functions of the embedded operating system to realize file reading, decoding and The display is performed synchronously.

[0017] 2. Create two double data buffers, the first double data buffer FileBuffer0 and FileBuffer1 are used to resolve the conflict between the file reading process and the image data decoding process, because the file reading process needs to put the read image data into In the data buffer, the image data decoding process needs to perform operations on the image data in the data buffer to achieve the purpose of decoding. The double data buffer can solve this problem and make the image decoding faster, such as figure 2 shown....

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Abstract

The invention provides a soft decoding method for image data. Three processes, including file reading process, image data decoding process and image display process, are first created, a first dual data buffer (FileBuffer0 and FileBuffer1) for solving the conflict between the file reading process and the image data decoding process and a second dual buffer (DecoderBuffer0 and DecoderBuffer1) for solving the conflict between the image data decoding process and the image display process are created, the real-time scheduling kernel of an embedded system is utilized to carry out the synchronous operation of the three processes, and the dual data buffer and the communication between the processes are utilized to solve the data buffer access conflict between the file reading process, the image data decoding process and the image display process. The invention can reduce the processing time of the CPU and save the overhead of the system memory, and does not affect the display effect of images, and thereby a digital set top box can have a digital photo frame function.

Description

technical field [0001] The invention relates to a soft decoding method of image data. Background technique [0002] In recent years, with the promotion of cable digital TV, cable digital TV set-top boxes have gradually entered thousands of households. The function of digital TV set-top box is also getting closer to multimedia products such as music player and digital photo frame, wherein digital photo frame is mainly based on JPEG standard, and said JPEG (Joint Photographic Experts Group) is the English abbreviation of Joint Photographic Experts Group. A group jointly established by the CCITT (The International Telegraph and Telephone Consultative Committee) and the International Organization for Standardization ISO in 1986 is responsible for formulating coding standards for still digital images. [0003] At present, picture decoding generally adopts two methods of software decoding and hardware decoding. Although the implementation of hardware decoding is simple and fast,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N1/41
Inventor 刘斌
Owner FUJIAN NEWLAND COMM SCI TECH