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Image bit stream transmission method and image encoder

A technology of bit stream transmission and image coding, which is applied in image coding, image data processing, pulse modulation TV signal transmission, etc., and can solve problems such as memory exhaustion

Inactive Publication Date: 2009-07-01
QUANTA COMPUTER INC
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Problems solved by technology

[0005] In addition, such as the method proposed in U.S. Patent No. 6,167,153, this invention is a method for improving the JPEG compression speed, but due to the characteristics of memory access, the bottleneck of the image extraction system lies in the output of the bit stream from the memory to the storage device. efficiency
And some image devices use a large amount of memory buffer to carry the compressed image data to improve efficiency, but the memory is easy to run out after extracting several images

Method used

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  • Image bit stream transmission method and image encoder
  • Image bit stream transmission method and image encoder
  • Image bit stream transmission method and image encoder

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Embodiment Construction

[0030] see figure 2 , figure 2 Schematic representation of JPEG image format 2. The image bit stream transmission method of the present invention is used to increase image transmission efficiency. The image format can be JPEG or other similar formats. The technical features of the present invention will be described below using the JPEG image format. Such as figure 2 As shown, the JPEG image format 2 includes an image start mark (Start of Image, SOI) 20, a JFIF (JPEG File InterchangeFormat) application data block (reserved for application use) 22, a quantization table (DefineQuantization Table, DQT) 24, and a scan start mark (Start of Scan, SOS) 26, primary compressed data (primary compressed data) 28, and end of image (End of Image, EOI) 30. Wherein, the JFIF application data block 22 further includes a thumbnail data block (thumbnail) 220 of the JPEG image and a JFIF application data block mark (APP marker) 222 .

[0031] see image 3 as well as Figure 4 , imag...

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Abstract

The invention relates to an image bit stream transmission method and an image coder adopting the method. The image comprises an image beginning label, a scanning beginning label and main compression data. The method comprises the following steps: according to a beginning address of the image beginning label, the data quantity between the image beginning label and the scanning beginning label, and a beginning address of the main compression data, redundant data is produced; and then the space between the image beginning label and the scanning beginning label is filled with the redundant data selectively. The method is capable of not only increasing the speed, at which image data is transmitted to a storage device, but also improving the efficiency of image extraction remarkably.

Description

technical field [0001] The present invention relates to an image bit stream transmission method and an image encoder, and in particular to a method for increasing the transmission efficiency of an image bit stream. Background technique [0002] JPEG (Joint Photographic Experts Group) is one of the most common image formats in image extraction products, such as digital cameras and mobile phones. As image resolution and image quality increase, the size of the JPEG bit stream increases accordingly. Due to the size of the JPEG bitstream, it must therefore take more time to write the bitstream from memory to the storage device. How to increase the storage efficiency of the JPEG bit stream and increase the transmission speed of the bit stream to provide users with a better environment is one of the important goals today. [0003] see figure 1 , figure 1 A schematic diagram representing the image extraction system. Such as figure 1 As shown, the reader 10 is used to extract i...

Claims

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Application Information

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IPC IPC(8): H04N7/24G06T9/00
Inventor 郑世扬
Owner QUANTA COMPUTER INC
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