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Memory and storage method for video stream pixel-level data random real-time access

A real-time access, pixel data technology, applied in the direction of memory system, image data processing, image data processing, etc., can solve the problems of long data reading cycle and high price, achieve full utilization of storage space, improve quality, and reduce space occupation Effect

Active Publication Date: 2016-12-07
SICHUAN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method that can reduce data acquisition for the shortcomings of the prior art that the data reading cycle is long, it needs to be stored with a large-capacity SRAM, and the price is expensive. Cycle and time, reduce storage module cost, meet random real-time access to the memory and storage method of high-resolution video streaming data

Method used

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  • Memory and storage method for video stream pixel-level data random real-time access
  • Memory and storage method for video stream pixel-level data random real-time access

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Embodiment Construction

[0036]This embodiment is based on the application of the maximum resolution (2560×1600) of video stream images, 60Hz refresh rate, the required storage space: 2560×1600×3×8bits=11.72M bytes, and the access bandwidth of image data: 2560×1600×60× 24(bit)×4(4 pixels)=23.6Gbps.

[0037] Since the odd and even rows of the image data stream are stored separately, the memory used to store the image data is not less than 23.44MB.

[0038] See attached figure 1 .

[0039] In the prior art, the pixel-level data of the video stream is randomly accessed in real time, and the four pixels of the source image required for each pixel of the output image are adjacent, but their positions on the source image may be random. Therefore, according to the address of the source image pixel, four pixel data required by the destination pixel are read out from the memory. The position arrangement of the four pixel data in the source image is as follows: figure 1 As shown, if two pixel points adjacen...

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Abstract

The invention discloses a memory and a storage method for video stream pixel-level data random real-time access. The memory is formed through the combined expansion of two groups of QDR2 storage modules, each group comprises two QSR2 storage modules; each group of storage module combination is provided with an image data odd line storage unit and an even line storage unit; the image data is respectively stored in the odd line storage unit and the even line storage unit, and then two groups of storage units are used for respectively storing one-half odd frame and one-half even frame to parallel work through the adoption of a ping-pong buffer mode, thereby realizing the video stream real-time processing. Each image data access is performed according to the read-write mode of two data outburst mode to splice into 3 pixel data structures with each pixel data structure bandwidth as 24bit. Each write is to repeatedly write the last pixel of the last time except the first write of each line in the data write process. Each redundantly stored pixel data is used for simultaneously reading / writing four pixel values through the adoption of one pixel clock cycle, the clock cycle of the video stream data random real-time access is greatly lowered, and the memory space occupation and the cost are lowered.

Description

1. Technical field [0001] The invention belongs to the technical field of video image application, relates to the storage of high-resolution video stream data, in particular to a memory and a storage method for random real-time access of video stream pixel-level data. 2. Background technology [0002] In the field of video image applications, random real-time access to high-resolution video stream pixel-level data streams is essential in the generation of video images, and the fluency of random real-time access, pixel clock cycle, and read data efficiency directly affect the quality of video images . [0003] For a high-resolution video stream data processing system, in addition to sufficient storage space and sufficient data access bandwidth, the storage unit also needs to be able to randomly read and write the pixel data of the input image at all pixel addresses in the frame , this random read / write capability is necessary for full-screen pixmap transformations of image d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06G06F5/16G06F12/0875G06F12/0879G06T1/00G06T1/60
CPCG06F3/0608G06F3/0611G06F3/0638G06F5/16G06F12/0875G06F12/0879G06T1/0007G06T1/60G06F2212/455
Inventor 张行应三丛范昌平王兴政
Owner SICHUAN UNIV
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