Quadrupling over-sampling data recovery method and system

Abstract

The invention discloses a data restoration system of fourfold oversampling, comprising: a charge pump phase lock loop, for generating a plurality of frequency multiplication frequency signals after receiving the frequency signals; a fourfold oversampler for outputting the M signals after sampling the serial data according to the frequency multiplication frequency signals, wherein each of the serial data can be sampled by four times; a data restructure unit, for receiving the M signals outputted by the fourfold oversampler, generating the (M+N) signals after combining the M signals for the secondary reception continuously; and a digital phase lock loop, receiving the (M+N) signal and differentiating as N+1 groups of M data, and one group of M data to generate P restoration data from the N+1 groups of M data. According to the invention, a charge pump PLL with lower frequency multiplication is used, and the multidigit serial data are sampled at the same time.

Description

Four times oversampling data recovery method and system technical field The invention relates to oversampling data recovery technology, in particular to a four times oversampling data recovery method and system. Background technique The receiver (Rx) based on the TransitionMinimizedDifferentialSignaling (TMDS) standard or the High Definition Multimedia Interface (HDMI) standard has a frequency channel (channelC) for transmitting frequency signals and three The color channels (channel[0:2]) used to transmit the serial data (serialdata) of red (R), green (G), and blue (B) respectively. According to TMDS and HDMI standards, the frequency signal (CLK) is 25-165MHz, and the data transmission rate (datarate) of the color channel is ten times of the frequency signal. That is to say, any color channel in a frequency signal cycle will have ten-bit serial data transmitted, and the receiving end of TMDS or HDMI must use the above relationship to recover the ten-bit serial data of e...

AI Technical Summary

Problems solved by technology

In addition, both methods and systems can only sample serial data four bits at a time

For the method and system of 3 times oversampling, when the skew of the serial data is too serious, the sampled data may have errors at the same time, resulting in the situation that the data cannot be recovered correctly (recovery)

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