Image Decoding Device Merge Skip Transform Coefficients
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Solution Overview
Problem
Existing video image encoding and decoding technologies do not sufficiently reduce the bit rate of encoded data, as they only partially apply skip or merge operations to specific information within encoded data, limiting the reduction of code rate.
Innovation Solution
An image decoding device and encoding device that decodes and encodes data by including merge/skip information for transform coefficients, allowing the inference of presence information, thereby omitting unnecessary information and reducing the bit rate of encoded data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If presence information indicating whether frequency-domain transform coefficients are included is explicitly decoded for each transform unit, then decoding accuracy is improved, but the bit rate of encoded data increases
Solution Approach 1:
The patent merges the presence information of frequency-domain transform coefficients with merge/skip information that is already being transmitted for other coding units. By combining these information elements into a single encoded data stream, the patent avoids transmitting redundant presence information separately, thereby reducing bit rate while maintaining decoding accuracy. The decoder uses this merged information to accurately determine whether transform coefficients are present without requiring additional bits.
2Measurement precision
If all transform coefficient information is explicitly encoded, then decoding precision is improved, but the code rate increases
Solution Approach 1:
The patent extracts and transmits only the essential presence information indicating whether frequency-domain transform coefficients are included, rather than encoding all transform coefficient data. This selective extraction approach removes redundant information from the encoded stream, significantly reducing the code rate while preserving the critical information needed for accurate decoding of transform coefficients when they are present.
Solution Approach 2:
The patent applies partial encoding by only transmitting presence information for transform coefficients rather than encoding the complete transform coefficient data. This partial action approach encodes only the necessary portion of information required to reconstruct the image data, achieving adequate decoding precision while minimizing the code rate through selective information transmission.
Data Source
AI summary
A video image decoding device (1) is equipped with a TT information decoder (14) that, in the case where encoded data includes merge/skip information that merges or skips presence information indicating whether or not frequency-domain transform coefficients are included in the quantized transform coefficients, does not decode the presence information, and a TT information inference unit (33) that, in the case where the encoded data includes merge/skip information that merges or skips the presence information, infers the presence information. The TT information decoder (14) uses presence information inferred by the TT information inference unit (33) to decode the encoded and quantized transform coefficients.