CN203233509U

CN203233509U - Central code stream analysis and transcoding bedded apparatus for monitoring digital TV

Info

Publication number: CN203233509U
Application number: CN 201320148751
Authority: CN
Inventors: 袁三男; 王绍徐
Original assignee: Shanghai University of Electric Power
Current assignee: Shanghai University of Electric Power; University of Shanghai for Science and Technology
Priority date: 2013-03-29
Filing date: 2013-03-29
Publication date: 2013-10-09
Anticipated expiration: 2023-03-29

Abstract

The utility model relates to a central code stream analysis and transcoding bedded apparatus for monitoring digital TV. The central code stream analysis and transcoding bedded apparatus comprises a modem reception module, a data decryption module, an audio-video decoding module, an FPGA field programmable gate array, an embedded CPU and an audio and video coding module, wherein digital TV signals is transmitted to the modem reception module through a cable, the modem reception module outputs singles which are divided into two sets, of which one set is directly input to the embedded CPU through the FPGA field programmable gate array, and the other set is transmitted to the embedded CPU through the audio and video coding module after running through the data decryption module, the audio-video decoding module and the FPGA field programmable gate array, and the embedded CPU sends out the signals through a network. Digital TV is monitored through an embedded hardware system, which improves the timeliness and reliability of the system. The central code stream analysis and transcoding bedded apparatus is applicable to monitoring digital TV in State General Administration of Press, Publication, Radio, Film and Television, offices of broadcasting and television of all provinces and cities, and network companies.

Description

The flush mounting of code stream analysis and transcoding in digital television monitoring

Technical field

The utility model relates to a kind of digital television monitoring technology, particularly the flush mounting of code stream analysis and transcoding in a kind of digital television monitoring.

Background technology

Digital Television is the new technology just grown up nearest this year, yet develops very fastly, has determined all to convert all simulated televisions to Digital Television in the recent period at present.Radio and television are mouthpieces of China party, government and the people, for its signal quality, transferring content etc., must carry out Monitoring and supervision.The same with simulated television, Digital Television also must be carried out real-time Monitoring and supervision.There is no corresponding standard or platform on the Monitoring and supervision of Digital Television at present, the technological means realized does not have unified standard yet, after having quite a few to adopt PC to gather digital television signal, application software detects analysis, this mode amount of calculation is large, real-time is poor, because PC is not suitable for work in 7 days 24 hours, therefore this mode realizes that the monitoring of Digital Television is not bery suitable simultaneously .

Summary of the invention

The utility model is the problem large for present digital television monitoring amount of calculation, that real-time is poor, the flush mounting of code stream analysis and transcoding in a kind of digital television monitoring has been proposed, adopt and embed the Monitoring and supervision that hardware system is realized Digital Television, improved real-time, the reliability of system.

The technical solution of the utility model is: the flush mounting of code stream analysis and transcoding in a kind of digital television monitoring, comprise the modulation /demodulation receiver module, the data deciphering module, the audio/video decoding module, the FPGA field programmable gate array, embedded type CPU, the audio/video coding module, digital television signal is input to the modulation /demodulation receiver module by the transmission of wire cable, modulation /demodulation receiver module output signal is divided into two groups of outputs, directly input embedded type CPU for one group after the FPGA field programmable gate array, another group is through the data deciphering module, the audio/video decoding module, arrive embedded type CPU by the audio/video coding module again after the FPGA field programmable gate array, embedded type CPU sends out signal by network.

The beneficial effects of the utility model are: the embedding implementation method of code stream analysis and transcoding in the utility model digital television monitoring, improve real-time and the reliability of digital television monitoring, can be applied to the supervision monitoring that General Bureau of Radio, Film and Television or each province and city radio and television departments, network company carry out Digital Television.

The accompanying drawing explanation

The flush mounting structured flowchart that Fig. 1 is code stream analysis and transcoding in the utility model digital television monitoring.

Embodiment

The flush mounting structured flowchart of code stream analysis and transcoding in digital television monitoring as shown in Figure 1, digital television signal is input to the modulation /demodulation receiver module of system by the transmission of wire cable, be reduced into original digital television signal, be TS stream, this stream is divided into two groups of outputs, directly input embedded type CPU for one group after the FPGA transmission and carry out code stream analysis, CPU comprises that by analysis result radio frequency parameter, three grades of warning messages etc. send monitoring center to by network.Another group TS flows to capable data deciphering module, audio/video decoding module, after processing, FPGA realizes that through audio/video coder hardware encoding becomes the compression video-voice frequency flow of any compressed format, any demand volume again, again by the Internet Transmission of embedded type CPU, to system monitoring video recording center for post analysis, review.

system input digital television signal, this signal is the transport stream TS form after modulation.At first Applied Digital television-specific demodulator carries out demodulation to this signal, the TS of outputting standard stream after demodulation.The shunting simultaneously of this TS stream is given to the FPGA field programmable gate array carries out code stream analysis and data deciphering, decoding, coding module carry out the code stream conversion.The code stream analysis module is according to the definition of Digital Television supervision monitoring requirement and TS stream, resolve the various information in TS stream, comprise that all kinds of forms are as program customizing messages PSI table, information on services SI table, video-audio program, tri-grades of alarm analysis of data flux statistics etc. and TR101290 are mainly completed by FPGA and embedded type CPU simultaneously, FPGA mainly realizes the extraction of live signal, and CPU mainly realizes the extraction of various information form and the analysis of parameter.Data deciphering, decoding, coding module are mainly realized the conversion of code stream.According to whole supervisory systems requirement, can be by the different-format of original figure TV as MPEG2, MPEG4, H.264 convert the form of regulation to, as H.264, the requirements such as limit on transmission bandwidth are stored, met to while in order to realize data, the flow of each digital television program need to be reconfigured, and even resolution also can require to change.These functions are called for short the transcoding module by data deciphering, decoding, coding module and realize.Native system adopts application-specific integrated circuit ASIC to realize data deciphering, video and audio decoding, video encoding, for the variation of resolution, adopts FPGA to realize.The packed data code stream that coding module generates again by CPU deliver to that the supervisory systems network platform is checked, the network storage, historical playback etc., thereby realize the supervision monitoring of whole digital television system.

Claims

1. the flush mounting of code stream analysis and transcoding in a digital television monitoring, it is characterized in that, comprise the modulation /demodulation receiver module, the data deciphering module, the audio/video decoding module, the FPGA field programmable gate array, embedded type CPU, the audio/video coding module, digital television signal is input to the modulation /demodulation receiver module by the transmission of wire cable, modulation /demodulation receiver module output signal is divided into two groups of outputs, directly input embedded type CPU for one group after the FPGA field programmable gate array, another group is through the data deciphering module, the audio/video decoding module, arrive embedded type CPU by the audio/video coding module again after the FPGA field programmable gate array, embedded type CPU sends out signal by network.