Method and apparatus for real-time image data transmission

A data transmission method and image data technology, applied in the field of real-time image data transmission and devices, can solve the problems of wrong image data, image data loss, image and video quality degradation, etc., and achieve high compression signal-to-noise ratio and USB bandwidth utilization rate High, good visual subjective effect
CN101299808AInactive Publication Date: 2008-11-05BEIJING SIGMACHIP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING SIGMACHIP CO LTD
Publication Date
2008-11-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a data transmission method used in the image transmission system and a device, comprising: a device for real-time receiving the image data, wherein the device divides the received image data into a plurality of image blocks to real-time transmit to the host computer through a USB interface, also comprises a buffer area with the capacity MAXP, a buffer, an image compression controller and an image compressor. The image compression controller performs the computation according to the size of the residual capacity of the buffer, and controls the compression format algorism based on the computed result. The device and the method has the advantages of better image quality, high compression SNR, good vision subjective effect and high availability of the USB bandwidth.
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Description

technical field

[0001] The invention relates to an image data transmission method and device, in particular to a real-time data transmission method and device for preventing data buffer overflow during real-time transmission of USB interface image data. Background technique

[0002] Now, the USB (Universal Serial Bus) interface has been widely used in peripheral devices, such as mouse, keyboard, storage device, etc., and the data transmission and communication between the device and the host are carried out through the USB interface device, and it is also applied to the video image of the camera. Data transfer in progress.

[0003] figure 1 Shown is a system structure diagram of a conventional camera with a USB interface. Among them, the sensor in the camera captures the video image in real time and transmits it to the image processor through the sensor interface. Since the captured image data is usually large, it is necessary to compress the image data when using the USB ...

Claims

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