A synchronous handshake circuit and image filter

Abstract

The invention discloses a synchronous handshake circuit. The synchronous handshake circuit includes a plurality of control units; each control unit includes an OR gate, a first register, a first AND gate, a second register, a second AND gate and a NOT gate; wherein , the input end of the first register is connected with the output end of the OR gate; the first input end of the first AND gate is connected with the output end of the first register, and the output end is connected with the input end of the second register; the output end of the second register Both are connected with the second input end of the OR gate and the input end of the NOT gate; the output end of the NOT gate is connected with the second input end of the second AND gate. The invention also discloses an image filter. The solution proposed by the present invention can realize that each stage of the pipeline is controlled independently, and all the pipelines will not stop working due to the situation of other stages, which improves the efficiency of calculation and transmission, and reduces the overall time of data retention.

Description

technical field [0001] The invention relates to the field of filters, in particular to a synchronous handshake circuit and an image filter. Background technique [0002] At present, almost all image processing algorithms in the field of digital IC use FIR filters, and this type of filter has no feedback signal. The traditional hardware language programming idea is to use the ready / need handshake signal as the judgment condition, so as to realize the beat-by-beat control of the input data calculation. For the design of FIR filter without feedback, it can be realized by using traditional hardware language programming ideas, but when changes such as increasing the filter order occur, engineers need to spend more time to upgrade. However, in the face of design requirements with feedback signals such as IIR filters, it becomes particularly complicated, and the maintenance cost will skyrocket. [0003] In the prior art, a state machine is used to separate control and calculation...

AI Technical Summary

Problems solved by technology

For the design of FIR filter without feedback, it can be realized by using traditional hardware language programming ideas, but when there are changes such as increasing the order of the filter, engineers need to spend more time on upgrading

However, when faced with the design requirements of IIR filters with feedback signals, it will become particularly complicated, and the maintenance cost will also rise linearly.

[0003] In the prior art, the state machine is used to separate the control from the calculation, so as to realize the control of the input data calculation. However, the implementation of the state machine is to control the entire pipeline. Due to the situation of other levels, all pipelines stop working

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