VC1 Intensity Compensation Circuit for Simultaneous Motion Processing
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Solution Overview
Problem
Conventional VC1 video standard systems face inefficiencies due to separate intensity compensation steps that prevent simultaneous motion compensation, leading to resource wastage and increased memory bandwidth usage.
Innovation Solution
A system comprising circuits that enable simultaneous motion and intensity compensation by integrating intensity compensation into motion compensation memory reads, eliminating the need for additional bandwidth and allowing both processes to occur concurrently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If intensity compensation is performed as a separate step before motion compensation, then intensity compensation can be applied to the reference frame, but memory bandwidth increases and motion compensation cannot occur simultaneously
Solution Approach 1:
The patent combines intensity compensation and motion compensation into a single simultaneous operation. The intensity compensation circuit operates in parallel with the motion compensation circuit, both accessing the reference frame memory concurrently. This merging eliminates the sequential dependency, allowing both compensation processes to occur at the same time without blocking each other, thereby improving processing efficiency while maintaining intensity compensation quality.
Solution Approach 2:
The patent introduces a temporal dimension to the intensity compensation process by performing it concurrently with motion compensation rather than sequentially. The intensity compensation circuit reads reference frame data and applies compensation while the motion compensation circuit simultaneously reads the same data for motion vector calculation. This temporal parallelization reduces total processing time and improves productivity.
2Reliability
If intensity compensation is implemented as a separate step, then intensity compensation can be applied correctly, but dedicated hardware resources are wasted and memory bandwidth increases
Solution Approach 1:
The reference frame memory serves multiple functions simultaneously: it provides data for both intensity compensation and motion compensation operations. The intensity compensation circuit and motion compensation circuit both access the same memory buffer, making the memory resource universal rather than dedicated to a single function. This multi-functionality reduces hardware resource requirements while maintaining compensation accuracy.
Solution Approach 2:
The patent merges the intensity compensation and motion compensation operations into a single hardware pipeline. Both circuits share common resources including the reference frame memory and processing units, eliminating the need for separate dedicated hardware for intensity compensation. This merging reduces device complexity and improves hardware resource utilization efficiency.
3Reliability
If intensity compensation is performed sequentially before motion compensation, then intensity compensation can be applied, but processing time increases and real-time performance is reduced
Solution Approach 1:
The patent ensures continuous useful action by performing intensity compensation and motion compensation operations simultaneously rather than sequentially. Both circuits operate in parallel throughout the same time period, eliminating idle waiting time. The intensity compensation circuit continuously processes reference frame data while the motion compensation circuit simultaneously processes the same data, maximizing hardware utilization and minimizing total processing time.
Solution Approach 2:
The patent transitions from sequential time-based processing to parallel spatial processing. The intensity compensation and motion compensation circuits operate in parallel dimensions, both accessing the reference frame memory simultaneously. This dimensional change from sequential to parallel processing reduces total processing time while maintaining the correctness of intensity compensation through proper data routing and synchronization.
Data Source
AI summary
An apparatus comprising a first circuit, a second circuit and a third circuit is disclosed. The first circuit may be configured to generate an output signal and one or more motion vectors in response to (i) a bitstream signal and (ii) a predictor signal. The second circuit may be configured to generate one or more reference data pixels in response to an address signal and the output signal. The third circuit may be configured to generate the predictor signal and address signal in response to (i) the motion vectors and (ii) the reference data pixels.