HDB3 code decoding device and method

Abstract

The invention provides an HDB3 decoding device and method, and belongs to the technical field of data communication. The device comprises a shaping module, a clock module, a pulse broadening module, aHDB3 decoding module, and a post-stage module, wherein the shaping module is used for shaping two 50% duty ratio monopole return-to-zero codes inputted from the outside; the clock module is used forrecovering one path of monopole return-to-zero code after shaping into a line clock signal by utilizing a digital phase-locked loop; the pulse broadening module is used for converting two paths of input monopole return-to-zero codes with the duty ratio of 50% into monopole non-return-to-zero codes according to the recovered line clock signal; the HDB3 decoding module is used for sampling a single-pole non-return-to-zero code by utilizing the recovered line clock signal, carrying out double-single conversion to obtain a path of signal, and marking the position of a V point; and the post-stage module is used for decoding according to the signal and the V point position. Through the design, clock information of a line can be automatically recovered without depending on an external clock extraction chip so that an HDB3 code is decoded, and the device and the method are simple to implement and convenient to modify and debug.

Description

technical field [0001] The invention belongs to the technical field of data communication, and in particular relates to an HDB3 code decoding device and method. Background technique [0002] HDB3 encoding is the standard encoding for E1 channel transmission. When the devices at both ends are connected using E1, the receiver needs to extract the line clock from the E1 signal. However, there is no dedicated time slot for sending clock information in the E1 protocol, and the sender cannot be predicted. Whether the data has clock information. Therefore, it is particularly important to extract line clock information in HDB3 code decoding. Contents of the invention [0003] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a HDB3 code decoding device and method, which can automatically restore the clock information of the line without relying on an external clock extraction chip, so as to decode the HDB3 code. [0004] In order to achi...

AI Technical Summary

Problems solved by technology

[0002] HDB3 encoding is the standard encoding for E1 channel transmission. When the devices at both ends are connected using E1, the receiver needs to extract the line clock from the E1 signal. However, there is no dedicated time slot for sending clock information in the E1 protocol, and the sender cannot be predicted. Does the data have clock information

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