The Radio And Television Networks Application Of Ip Over Sdh
Calculate the volume of the new channel. The definition of the private descriptor is not complicated, the definition of General unified approach to require all operators, integrators, manufacturers to comply, they can fundamentally solve the problem of inconsistent volume, this is a good solution.
1. The volume level descriptors (recommended)
Channel_audio_volumne_descriptor () (Remarks Descriptor_tag8uimsbf descriptor tag Descriptor_length8uimsbf descriptor length For (i = 0; iservice_id16uimsbf business identifier
Audio_volumne_refercence8uimsbf volume level reference value ) ) 2. About the consistency of the sound channel
Audio video business case for two main TV in the provinces, the business information view the TV signal for the video service, two-channel audio, set-top box business information will set it to read two-channel, it did not know the left channel is the video audio, right channel is the province of radio, appeared in two-channel sound different, and this is not classified according to the provisions set business type and business information (SI). According to DVB-C standard, with broadcast TV programs, should be set for the two operations, one is the video business (mono), an audio business, the receiver solution according to the required business need. In strict accordance with the standards of domestic TV set business information, not only resolved when the set-top box to receive the two-channel sound different issues, but also convenient to separate the service platform will be broadcast to more than one reuse program TS stream, you can transfer an analog channel several hundred sets of radio, is conducive to the coordinated development of television and radio.
In the broadcast business, digital audio level of unity and balance is a difficult, digital TV business information for us to better solve this problem provides an effective technical means. Digital TV has many problems seem very complicated, difficult to resolve, but as long as the entire digital TV standards have a thorough understanding of it is easy to solve, the overall translation work more easily.
Currently developed countries are basically the backbone network using SONET / SDH transmission systems. In China, the poetry of 40% to 50% of the rate of growth, with the Internet’s rapid growth, worldwide IP data traffic increases exponentially, thus the use of the existing SDH network of large and economically efficient transmission of data services become the most important issue facing SDH. “Information industry” 15 “Plan” that “in the long-distance network with IPoverSDH / WDM, high-speed (G-bit or T-bit) routers and the optical wavelength router technologies such as broadband IP backbone network set up; within the city by 10 Zhao, Fast, Gigabit Local Area Network (LAN) and IPoverSDH / WDM, high-speed (G-bit or T-bit) routers and other technology to build a broadband IP MAN. ”
In performance, broadband IP business, DWDM equipment, higher prices, in the small city line, and shorter distances, the cost advantage is not obvious. Many provincial trunk network construction early because most of the STM-16 SDH using technical design, application IPoverSDH technology, low investment and quick returns and high line utilization. So for now, the development of high-performance IP services, IPoverSDH is a better choice.
1, IPoverSDH technology advantages
Although IP access network access technology used in a wide variety, but always need a high degree of reliability of the transmission network load.
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