The preprocessor can extract clock information from NRZ data stream, which consists of a delay cell, a multiplier and a narrow-band filter.
预处理器主要有延迟单元、乘法器和窄带滤波电路构成，可以从NRZ数据中得到时钟信号。
2
While minimizing the use of clock cycles, it could decode the coded stream of transform coefficients in each block and output the decoded coefficients in zigzag scanning order.
Bit synchronous clock recover circuit is the key part of the communication system, it can exactly recover the synchronous signal from input data stream.