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The 400 m2 studio of YiWu TV station


Video System

This studio system has 8 full HD channels (of which 2 are for future extension). Inside the studio, a big LED screen is used as the background to flexibly provide rich back scenes; in the studio, a jib arm is used to control video cameras’ ascending, descending, pitching and rotating to realize panoramic effects’ shooting during program production.

The video switch system is designed to use one 2-level M/E HD digital video effect switcher and one multi-stream matrix. All signal sources enter the switcher and the matrix at the same time after allocation. Upon emergencies, the either-or switcher can switch PGM signals, which promote the system’s safety to the utmost.

Switcher and Matrix

This studio system has direct access to the HD digital video switcher. Together with the matrix’s input signal sources, there are 20 channels of HD HD-SDI signals in total, including 8 channels from video camera, 1 set of V/K signal from the character generator, 2 channels from HD video recorder, 1 channel from HD video player, 1 channel of VGA, 2 channels of incoming video (4 channels optional), and 1 channel of HD HD-SDI TEST. Similar HD signal sources enter the 32*32 multi-stream digital matrixes at the same time. Meanwhile, the switcher’s P/P PGM, M/E PGM, P/P CLEAN, M/E CLEAN and AUX signals also enter the matrix. The switcher outputs HD PGM signals that enter the recording system.

Emergency Switch

After allocation, signal sources respectively enter the input of the switcher and the matrix to realize signal sources’ complete mirror. The matrix is used as the backup during video switch in the system. When the switcher has any failure, the matrix is used to complete the production of video programs to ensure the normal broadcast of programs. The character generator is liked with the video switcher and downstream keyer at the same time. When the matrix is used for switching upon emergencies, the character generator can generate subtitles and complete some special effects.

The system take double either-or switches for emergency switching. Output signals are sent to the master controller, studio interface board and etc. after down conversion.

Signal Sources’ Monitor

The monitor system takes a big screen and multi-screen separator design to achieve the combined effects of pleasant look and saving space and energy. The screen-split layout is fully considered for operation positions: channel pictures, PGM and PVW close to directors and instructors; server view close to video server operation positions; packaging and filling signal view close to online packaging positions. The location of the big screen is fully ergonomic to minimize operators’ visual and body fatigue after long-period operation.


Synchronizing System:

This is an external synchronizing system. This system’s synchronous generator receives synchronizing signals from a branch controlling and scheduling system. The active/standby synchronous machine of the branch controlling system make emergency switching by a synchronizing negater, which monitors synchronizing machine’s operation status. Once any failure occurs to the main synchronizing machine, the synchronous negater automatically switches to the standby synchronizing machine. At the same time, the synchronizing negater will give alarms. The synchronizing negater is also available for manual switching. Passing through the negater, synchronizing signals enter this system and then the synchronizing generator. The synchronizing signals output from the synchronizing generator of the system are sent to every device that requires synchronizing signals after allocation.

Clock System

In this studio, we take clock signals uniformly controlled by branch consoles that are used to make allocation. Studio’s time code allocator outputs clock signals to studios in need. Therefore, every studio’s countdown generator can generate normal timing and countdown at the same time and therefore, automatically calculate the time difference to effectively guarantee punctuality of programs.

Internal Intercom System

This system requires only a few call points for IFB calls of the instructor, lighting, audio camera shooting, and anchorpersons. We take two two-line call master stations to realize calls between instructors and technical points. Between instructors and the camera shooting, a two-line-to-four-line converter is used to convert two-line audios to four-line audios, which are accessed to video camera control units through a mixing allocator.


This studio’s dynamic UMD system includes UMD industrial personal computers, matrixes, switcher active/standby switches, screen splitter and GPO transmitter modules.

In normal operation of the system, UMD industrial personal computers are linked to SONY switcher equipment via RS422 to obtain the switcher’s cross point information, and then, processed by software, to obtain the sources corresponding to the output links of their PGM and PVW. Then, via UMD industrial personal computers, screen splitter and GPO transmitter module equipment, show Tally information and source name on the monitor.

Upon abnormality of the switcher, the system provides emergency solutions. Switch active/standby switch and the system will stop reading switcher information and it will read the matrix’s cross point information via the network. Then, after analysis, it will find out the matrix EMG channel’s source of corresponding matrix (emergency PGM signals). Then, like UMD information, Tally is also sent to the screen splitter and GPO transmitter modules via UMD industrial personal computer to show it on each monitor.

NDT UMD&TALLY system is the software system developed by NDT, which can communicate with the switcher, matrix, screen splitter and UMD related equipment to realize source name and TALLY tracing.