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Various audio over Ethernet systems use communication protocols to distribute word clock. The device which generates the word clock is the clock source for all the other audio devices. The signal is used for synchronizing digital audio signals between devices, such as CD players, audio I/O cards, etc. [1] It allows all the components in the ...
The bit clock pulses once for each discrete bit of data on the data lines. The bit clock frequency is the product of the sample rate, the number of bits per channel and the number of channels. So, for example, CD Audio with a sample frequency of 44.1 kHz, with 16 bits of precision and two channels (stereo) has a bit clock frequency of:
Marks a word for channel A (left) at the start of an audio block. The three preambles are called X, Y, Z in the AES3 standard; and M, W, B in IEC 958 (an AES extension). The 8-bit preambles are transmitted in the time allocated to the first four time slots of each subframe (time slots 0 to 3).
AES50 is a point-to-point interconnect which carries multiple channels of AES3, PCM or DSD bitstream formats, along with system clock and synchronisation signals, over Cat 5 cable using 100 Mbit/s Fast Ethernet physical layer. AES50 uses the four pairs of the Cat 5 cable in the 8P8C connector: Audio data transmit + Audio data transmit –
In this application, the connection is referred to as a Digital Audio Reference Signal (DARS). Further recommendations are made concerning the accuracy of sample clocks as embodied in the interface signal and the use of this format as a convenient synchronization reference where signals must be rendered co-timed for digital processing.
An McASP functions as a general-purpose audio serial port optimized for the needs of multichannel audio applications. Depending on the implementation, an McASP may be useful for time-division multiplexed streaming, inter-integrated circuit sound protocol, and intercomponent digital audio interface transmission (DIT). However, some ...
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The MDIO interface is implemented by two signals: MDIO Interface Clock (MDC): clock driven by the MAC device to the PHY. MDIO data: bidirectional, the PHY drives it to provide register data at the end of a read operation. The bus only supports a single MAC as the master, and can have up to 32 PHY slaves.