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I2S combined interface

An interface and serial interface technology, applied in the field of hard disk video recorders, can solve the problems of high cost and poor reliability.

Inactive Publication Date: 2004-03-10
SANLI DIGITAL TECHN SHANGHAI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the invention is to provide a kind of I 2 S combination interface, overcome the shortcomings of high cost and poor reliability of existing interface technology

Method used

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Embodiment Construction

[0021] In the Sanli HDR series hard disk video recorder, the analog audio and video signal enters the compression chip 3 to compress the data through digital processing (A / D conversion) 2, connects the IDE interface 12 with 8-bit parallel data and stores it in the hard disk 5, IDE Interface 12 is input to a VS conversion circuit after taking out data from hard disk 5, and conversion circuit processes, scrambles etc. with the image data of parallel mode, it is with serial mode, with I 2 The standard signal of S is input to the decoding chip 6 and decompressed, and after D / A processing 13, it becomes an analog video signal and is output to the monitor 4 . will be input to the decoder chip's I 2 The S signal lines are connected in parallel one way and add the driving isolation circuit 7, then the communication serial port of the main control CPU11 is added with the driving circuits 8, 9 and I of RS-232 or RS-485. 2 S is combined into a combined interface 10 . HDR uses mpeg1 com...

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Abstract

In the invention, I2S serial interface in hard disk video recorder is led out after its drive is insulated. Integrating the I2S serial interface with serial communication interface in main CPU of the recorder constitutes a combination interface for monitoring states of audio / video information output and recorder as well as controlling their functions. Comparing with prior art, the invention features high reliability.

Description

technical field [0001] The present invention relates to video camera interface technology, particularly a kind of hard disk video recorder, I 2 S combination interface. Background technique [0002] The data output in the hard disk video recorder includes USB, Ethernet, parallel port, 1394 and so on. The data output by these interfaces can be used for networking, backup, conversion and other applications. To configure any of these interfaces, it is necessary to add some chips in the video recorder, which will increase the cost of the stand-alone unit, increase the workload of development, and reduce the reliability. In addition, these interfaces have their own characteristics and are only suitable for a certain application, such as USB for backup and Ethernet for networking. At present, the transmission rate of the relatively mature USB1.0 interface is only 1Mbit / s, which cannot transmit various images in the mpeg image compression mode in real time. In addition to the n...

Claims

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Application Information

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IPC IPC(8): G06F3/00
Inventor 滕云海
Owner SANLI DIGITAL TECHN SHANGHAI
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