HD TS Stream Collection System Based On ASI Interface And Its Implementation

With the development of digital television technology, the number of digital television subscribers increase rapidly nationwidely .It provides a broad development of the market for gradually begining to broadcast high-definition digital TV. Moreover, the proportion of the current high-definition digital TV users in digital TV users is not high, so the development of high-definition television market has great potential. HDTV is the direction of digital television development, and currently the crucial problem of high-definition digital TV is lack of high-definition material.This stage, the asynchronous serial interface DVB ASI is widely used in radio and television broadcasting system for data transmission devices. ASI interface is a standard TS stream transmission interface, with high data transmission rate and excellent reliability features for high-speed point to point data transmission, particularly in the data volume of video data transmission. TS data stream is commonly used in digital television stream standard. The data stream can be compressed audio and video data, and can also be other relevant data. Transfering stream data from device with ASI interface to computers and editing TS stream data as files through a powerful multimedia computer the ability, it can very well solve the current issue of lack of HD material.Nowadays, because computers are generally not configured with current ASI interfaces, the computer can not directly receive TS stream data from devices with ASI interface. The system of recording HD TS stream based on ASI interface is built up and researched for the issue.The HD recording system has been designed for the majority of broadcasting network companise to increase high-definition program material, or to exchange and study material each other.The system receive multi-program TS stream using special receiver chip interface of ASI interface from the radio and television equipment with ASI , and communicates with computers through USB interface bus for data transmission. USB interface bus can be used to achieve up to 127 USB interface bus devices on the bus at the same time.The working characteristics of USB interface bus can be used to realize the multi-channel recording system easily. The software programs is designed to analyze information of TS stream,to demultiplex the multi-program TS stream and store the TS stream data of a single program TS stream in the computer. Meanwhile, server of the recording system has developed and the client of it with simple and beautiful application interface has been completed.The system of recording HD TS stream has achieved its functions, has good performance and stable operation. It has been applied and promoted in a number of radio and television broadcasting networks companies. Design of the system can be used to high-definition satellite recording system, but also the software part can be transplanted conveniently, significantly reduced the development difficulty of other related systems. The follow-up upgrade of the system is to achieve network structure and choose FPGA IP cores technology to complete ASI interface receiver function. It can further reduce the system cost.