Real Digital
Posted in Uncategorized on 09/08/2011 09:43 pm by admin
Yunnan People's Broadcasting Station to promote the general thinking digital
Zhu Yukun deputy director of Yunnan People’s Radio Technology, Senior Engineer
With the rapid development of IT industry in the development of broadcasting technology has changed the sluggish situation, communication technology, computer multimedia technology, computer network technology and audio technologies combine to promote the broadcast technology innovation and upgrading. The late 90′s, automatic broadcasting system, digital radio broadcast mixer in the widely used and popular; into the 21st century, radio has gradually begun to digital devices, analog devices mix shifted the transitional period of building real digital audio program production, broadcasting, exchange and transmission of digital audio within the intelligent network and external networks in the new period.
I sets the current eight frequencies, namely: the frequency of 576 news, traffic frequency, economic frequency, frequency of 97 music, 100 music frequency, Shangri-La frequency, international frequency, national frequency, after several years of equipment modification, quality been greatly improved, the basic realization of part of the digital, but there are some from the all-digital gap, as compared with the advanced radio, there still exist a gap.
1, Digital Master Control System My original master station some of the major traditional analog devices. After 2004, the building we have built the main INTP matrix (12 * 20AES/EBU figures; 24 * 6 analog stereo; 3 * 2MADI); prepared matrix NETWORK 16 X16 using 2 analog matrix (one for the input matrix, a the output matrix)
; Supporting matrix A / D, D / A converter to meet two sets of signals broadcast room. Basically die, the number of mixed use approach, but to achieve real exchange and transmission of digital programming, but also further improved.
Radio Digital Master Control System, network, intelligence represents the latest development trend of broadcasting. Such a system should be based on the way to achieve the bus, and its outstanding feature is the broadcast signal of the high-capacity transmission, intelligent exchange of scheduling, all of Taiwan comprehensive information sharing, integrated program monitoring and digital sound processing (DSP) functionality .
Bus transfer mode: The optical fiber TDM, MADI bus or ATM, ETHERNET network switching technology, multi-channel digital signal scheduling and transmission of arbitrary choice, not only the system uses a flexible and greatly reduce the workload of the system wiring is the radio station in After the digital age preferences. Optical TDM technology which is the most widely used and mature, with the most current operating concept integration, system compatibility best. As the bus master transfer mode technology matures, high-capacity radio transmission of voice signals and systems required to increase the urgency of resource sharing requirements increase, this model of radio broadcasting control system is widely applied.
Total control system is the hub of all the signals in the radio, the most important place is safe. A sound system of total control, in addition to advanced equipment, but also need to have good backup system, no single device can not guarantee 100% security, so a need for an intelligent switch that can automatically detect and the main backup system, the existing equipment is very difficult to rely on manual intervention. In addition, the total control system signal is transmitted directly to the transmitter, the signal quality directly affect the listening experience, so in addition to their good performance outside the device, but also on the overall control system input, output and signal transmission part of the real-time monitoring, and can be clearly shown through the computer system, so check-in staff to keep abreast of the merits of pre-launch signal is necessary. This point is based on TDM, MADI and other bus transmission of digital matrix itself, in the traditional analog and digital matrix basically difficult to achieve. As the frequency increases, the changing types of programs, in order to ensure absolute signal switching accuracy, must use computer-controlled intelligent switch, so they need advanced digital audio matrix.
For the above characteristics, the number of total control, I present only a platform for networked digital matrix, can not do two mutual backup, and as frequency increases, the need to further the existing matrix transformation; also need to increase the A / D, D / A, digital audio processors total control of auxiliary equipment.
2, digital broadcasting engine room Radio digital technology, the digital broadcast signal is a prerequisite, the security is also broadcast on the premise of the entire air security. Digital broadcast room is divided into peripheral equipment (CD, MD, delay, telephone pale pinkish purple, etc.) digital, digital audio workstations, digital broadcast console.
My desk now in all frequencies, the 576 frequency has been achieved by news INTP live mixing consoles and digital audio workstation-based network digital broadcast room. Begin broadcasting since the safety, convenience, and other broadcast quality have made very good results. Shangri-La frequencies used to AIRWAVE live mixing consoles and digital audio workstation-based traditional digital broadcasting room and other rooms are broadcast using traditional analog devices and digital audio stops, but the aging equipment has been in urgent need of reform. In order to facilitate and network connected Digital Master Control System and adapt to the development of digital broadcasting, avoiding duplication of investment in the future should be broadcast room of the transformation of a network of digital broadcast console.
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