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US 2006/0069555 A1Published application
Method, system and apparatus for allocating bits in perceptual audio coders
AssigneeIttiam Systems (P) Ltd.
InventorsPreethi Konda, Vinod Prakash
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Abstract
A non-iterative and computationally efficient bit allocation technique for perceptual audio coders employing uniform quantization schemes. This is achieved by computing a target MNR for all critical bands in a frame using a target bit rate and associated SMRs. Associated SNRs are then computed for the critical bands using the computed target MNR and the associated SMRs. Bits are then allocated to the critical bands based on the computed associated SNRs.
Claims21
A method of allocating bits in perceptual audio coders comprising:
- computing a target MNR for all critical bands in a frame using a target bit rate and associated SMRs;
- computing associated SNRs for the critical bands in the frame using the target MNR and the associated SMRs;
- and
- allocating bits to the critical bands based on the associated SNRs.
1 more element
An article comprising:
- a storage medium having instructions that, when executed by a computing platform, result in execution of a method, comprising:
- computing a target MNR for all critical bands in a frame using a target bit rate and associated SMRs;
- computing associated SNRs for the critical bands in the frame using the target MNR and the associated SMRs;
- and
- allocating bits to the critical bands based on the associated SNRs.
2 more elements
An apparatus comprising:
- an encoder that computes a target MNR for all critical bands in a frame using a target bit rate and associated SMRs, and wherein the encoder computes SNRs for all critical bands using the target MNR;
- and
- a bit allocator that allocates bits to all the critical bands based on the associated SNRs.
A system comprising:
- a bus;
- a processor coupled to the bus;
- a memory coupled to the processor;
- a network interface coupled to the processor and the memory;
- and
- an audio coder coupled to the network interface and the processor, wherein the audio coder further comprises:
- an encoder that computes a target MNR for all critical bands in a frame using a target bit rate and associated SMRs, and wherein the encoder computes SNRs for all critical bands using the target MNR;
- and
- a bit allocator that allocates bits to all critical bands based on the associated SNRs.
6 more elements
Dependencies are inferred from the claim text.