Broadcast All Network Background Support Subsystem

The radio Broadcasting Network is base of a new digital broadcasting,it is a radio integrated computer information processing system's platform. Digital Audio Workstation not only has traditional analog equipment's functions as the program recording, editing and storage, but also has the digital audio signal processing functions, including the automatic balanced between audio signals, extendly compress the stack, delay reverb and so on. Digital audio workstation system organization simply is composed of the work of system and workstation back support system. Radio digital audio workstation back support system is the bottom part of digital audio workstation, be responsible the process of program production, editing, management, finally automatically broadcast in order to achieve the required support functions.The author first introduced the the background research and the needs analysis of background support system, then author used technologies as advanced digital audio signal processing technology, software engineering technology, streaming media processing technology and combined with excellent professional audio processing software Adobe Audition3.0 the audio recording, edit platform of radio stations to achieve a digital audio workstation back support system. The system is the underlying basis for digital audio workstations, provide efficient supports for broadcast programming's the station's bottom layer functions.It enrich the radio program production personnel the means , enhance the effect of making the program and significantly increased the digital audio workstation's overall performance.Digital audio radio station required the background support system must be stability, reliability, advancedly technology, security, scalability, etc. So this paper complete the following contents:I: Audio material format conversion system's design and implementation which based on Directshow technology, including links filters to set up audio transcoding graph , and data storage filter– DUMP's transformation and so on. Provide material pre-processing for the workstation.II: Design and implementation of a digital audio volume automatically balanced system,including design the algorithm of volume balance and implementation it in form of directshow's filter,and using the digital watermarking technology to save the equilibrium value . Solved the broadcast station's volume mutation problem.III: Through design and implementation of professional audio processing software Adobe -Audition3.0's S48 plug, making Audition can support S48 format materials and integrate with the digital audio workstation.By the realization of these support functions, completed the supports for DAW's audio record function system .Finally, Author conclude the the content. The subject of radio stations digital audio workstation back support system have been deliver digital audio workstation with airlink-DAW for application, the systerm directly run stability, superior performance, achieve the desired target.