Delta-Sigma Signal Block Coupling for Boundary Continuity
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Solution Overview
Problem
Existing signal processing apparatuses using multiple delta-sigma modulation circuits face discontinuity issues at the boundaries of output signal blocks due to differing circuit states, complicating high-speed processing.
Innovation Solution
A signal processing apparatus that divides input signals into blocks, distributes them to delta-sigma modulation circuits with added overlap data, and couples the output blocks while considering the circuit states of adjacent modulation circuits to mitigate discontinuity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple delta-sigma modulation circuits are used to process divided input signal blocks in parallel, then processing speed is improved, but signal discontinuity occurs at block boundaries due to different circuit states
Solution Approach 1:
The patent applies preliminary action by adding overlap data to the input signal block before processing. Specifically, overlap data from a subsequent input signal block is added to the current input signal block, allowing the modulation circuit to process continuous signal segments even when handling divided blocks in parallel, thereby preventing discontinuity at block boundaries
Solution Approach 2:
The patent uses overlap data as an intermediary element between adjacent input signal blocks. This overlap data serves as a mediator that connects the end of one block with the beginning of the next, ensuring smooth transition and signal continuity when multiple modulation circuits process divided blocks simultaneously
2Reliability
If complex conditional branching criteria are used to select output signal blocks, then signal discontinuity is mitigated, but processing speed decreases
Solution Approach 1:
The patent extracts and eliminates the complex conditional branching selection process. Instead of using multiple modulation circuits and complex criteria to select among their outputs, the invention processes the entire input signal (with added overlap data) through a single modulation circuit, thereby removing the need for complex selection logic while maintaining signal continuity
Data Source
AI summary
A processing apparatus includes: a distribution unit that divides an input signal into input signal blocks, and distributes, in dividing order, the divided input signal blocks to delta-sigma modulation circuits; a parallel circuit unit including the delta-sigma modulation circuits that perform delta-sigma modulation on the input signal blocks and output output signal blocks; and a coupling unit that couples the output signal blocks outputted from the parallel circuit unit, thereby to generate an output signal such that a first output signal block reflects a result obtained from a first delta-sigma modulation circuit, which performs delta-sigma modulation on a first input signal block corresponding to the first output signal block, performing delta-sigma modulation on the first input signal block, and a state of a second delta-sigma modulation circuit that performs delta-sigma modulation on a second input signal block located immediately before or after the first input signal block.