Back to results
US 7,249,016 B2Granted
Quantization matrices using normalized-block pattern of digital audio
AssigneeMicrosoft Corporation
InventorsWei-Ge Chen, Naveen Thumpudi, Ming-Chieh Lee
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeMicrosoft Corporation
InventorsWei-Ge Chen, Naveen Thumpudi, Ming-Chieh Lee
Estimating the term…
Quantization matrices facilitate digital audio encoding and decoding. An audio encoder generates and compresses quantization matrices; an audio decoder decompresses and applies the quantization matrices. The invention includes several techniques and tools, which can be used in combination or separately. For example, the audio encoder can generate quantization matrices from critical band patterns for blocks of audio data. The encoder can compute the quantization matrices directly from the critical band patterns, which can be computed from the same audio data that is being compressed. The audio encoder/decoder can use different modes for generating/applying quantization matrices depending on the coding channel mode of multi-channel audio data. The audio encoder/decoder can use different compression/decompression modes for the quantization matrices, including a parametric compression/decompression mode.
A computer-readable storage medium having stored therein computer-executable instructions for causing a computer programmed thereby to perform a method of generating quantization matrices for plural blocks, wherein each of the plural blocks has one of plural available block sizes, the method comprising:
A method of generating quantization matrices for plural blocks, wherein each of the plural blocks has one of plural available block sizes, the method comprising:
A system for generating quantization matrices for plural blocks, wherein each of the plural blocks has one of plural available block sizes, the system comprising:
Dependencies are inferred from the claim text.