Therefore, when using a digital audio system, the first step is to select one of the devices and set it as the source of the word clock signal in this system, that is, the synchronous host. If different word clock signals appear in a system, it means that the sampling frequency in this system is not uniform, and it will not reach the synchronous working state, which will cause noise and other problems. In fact, digital audio equipment such as digital mixers and digital audio workstations can generate word clock signals themselves, but only one word clock signal source can be set in each digital audio system, because the word clock in each device The signal determines the sampling frequency in this device. To achieve the word clock synchronization state of the digital audio system, a (and only one) word clock signal generation source must be set in the system.
#Word clock frequency code#
This is because the effect of this synchronization method in actual operation is not as intuitive as the time code synchronization method.ġ.2 Set the word clock synchronization status of the system However, when there is a problem with the word clock synchronization status of the system, which results in a serious degradation of the signal quality (for example, the transmission of the word clock signal causes an extreme noise in the system), sometimes it is often ignored and the direction of the word clock To solve the problem. The word clock synchronization method plays a great role in stabilizing the transmission quality of digital signals in the system. Under the effect of the word clock signal, each device in the system achieves both frequency synchronization and phase synchronization, and can continue to work normally under stable conditions. The word clock signal has an accurate and stable sampling frequency, which can ensure that in each link of the digital audio system, the sending end and the receiving end of the signal work with the same sampling frequency, and the bits in the sending and receiving signals start at the same time. The word clock (Word Clock) is regarded as a kind of pulse signal, used to coordinate digital audio signals of different sampling frequencies to communicate in the same system. Word clock synchronization can only be used in digital audio systems. This synchronization method is still used in digital audio systems. Throughout the process, the time code scale displayed on all devices is exactly the same. Starting from the analog era, the most common synchronization method is the time code (TIme Code, or TC code) synchronization method, that is, to determine a unified time code in an audio system, all devices are based on this time code, from the same Start playback or recording at the time point.
Therefore, it is necessary to clarify some basic theories about word clock synchronization.
#Word clock frequency tv#
In order to meet the challenges brought by the era of high-definition and meet the production conditions of surround sound, all major domestic TV stations have adopted a fully digital audio system in the high-definition TV studios and OB trucks that have been put into use one after another. 1 Basic theory of word clock synchronization
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