Method and device for quantization of linear prediction coefficient and method and device for inverse quantization
AssigneeSamsung Electronics Co., Ltd.
InventorHo-sang SUNG
Life of this patent
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Abstract
A quantization apparatus comprises: a first quantization module for performing quantization without an inter-frame prediction; and a second quantization module for performing quantization with an inter-frame prediction, and the first quantization module comprises: a first quantization part for quantizing an input signal; and a third quantization part for quantizing a first quantization error signal, and the second quantization module comprises: a second quantization part for quantizing a prediction error; and a fourth quantization part for quantizing a second quantization error signal, and the first quantization part and the second quantization part comprise a trellis structured vector quantizer.
Claims15
A quantization apparatus comprising:
- a first quantization module for performing quantization without an inter-frame prediction;
- and
- a second quantization module for performing quantization with an inter-frame prediction,
- wherein the first quantization module comprises:
- a first quantization part for quantizing an input signal;
- and
- a third quantization part for quantizing a first quantization error signal,
- the second quantization module comprises:
- a second quantization part for quantizing a prediction error;
- and
- a fourth quantization part for quantizing a second quantization error signal, and
- the first quantization part and the second quantization part comprise a trellis structured vector quantizer.
A quantization method comprising:
- selecting, in an open-loop manner, one of a first quantization module for performing quantization without an inter-frame prediction and a second quantization module for performing quantization with an inter-frame prediction;
- and
- quantizing an input signal by using the selected quantization module,
- wherein the first quantization module comprises:
- a first quantization part for quantizing the input signal;
- and
- a third quantization part for quantizing a first quantization error signal,
- the second quantization module comprises:
- a second quantization part for quantizing a prediction error;
- and
- a fourth quantization part for quantizing a second quantization error signal, and
- the third quantization part and the fourth quantization part share a codebook.
An inverse quantization apparatus comprising:
- a first inverse quantization module for performing inverse quantization without an inter-frame prediction;
- and
- a second inverse quantization module for performing inverse quantization with an inter-frame prediction,
- wherein the first inverse quantization module comprises:
- a first inverse quantization part for inverse-quantizing an input signal;
- and
- a third inverse quantization part arranged in parallel to the first inverse quantization part,
- the second inverse quantization module comprises:
- a second inverse quantization part for inverse-quantizing the input signal;
- and
- a fourth inverse quantization part arranged in parallel to the second inverse quantization part, and
- the first inverse quantization part and the second inverse quantization part comprise a trellis structured inverse vector quantizer.
An inverse quantization method comprising:
- selecting one of a first inverse quantization module for performing inverse quantization without an inter-frame prediction and a second inverse quantization module for performing inverse quantization with an inter-frame prediction;
- and
- inverse-quantizing an input signal by using the selected inverse quantization module,
- wherein the first inverse quantization module comprises:
- a first inverse quantization part for quantizing the input signal;
- and
- a third inverse quantization part arranged in parallel to the first inverse quantization part,
- the second inverse quantization module comprises:
- a second inverse quantization part for inverse-quantizing the input signal;
- and
- a fourth inverse quantization part arranged in parallel to the second inverse quantization part, and
- the third quantization part and the fourth quantization part share a codebook.
Dependencies are inferred from the claim text.