TH2501002012A - Quantization of non-constant parameters for advanced connectivity. - Google Patents

Abstract

DEPCT68 This disclosure provides methods, devices, and computer software products for the quantization of non-constant parameters associated with parameter-dependent spatial audio encoding. This disclosure further relates to methods and toolkits for restoring audio objects in audio decoding systems that consider non-constantly quantized parameters. According to the disclosure, such manipulation makes it possible to reduce bit usage without significantly degrading the quality of the restored audio object.

Claims (4)

DEPCT68 1. The methods in audio decoders for dequantizing quantized parameters related to audio signal decoding include: obtaining at least the first quantized parameter and the second quantized parameter; dequantizing the first quantized parameter using a scalar quantization plan of the first map with a magnitude of the first non-constant step to obtain the first dequantized parameter, where the magnitude of the first non-constant step is chosen such that a smaller magnitude is used for the range of first parameters where human hearing is most sensitive, and a larger magnitude is used for the range of first parameters where human hearing is less sensitive; determining a scaling factor based on the first dequantized parameter; and dequantizing the second quantized parameter using a second quantization plan of the second map with a magnitude of the second non-constant step to obtain the second dequantized parameter. That has been dequantized. 2. The method of claim 1, where the second quantization plan is one of the scalar or vector quantization plans. 3. The dequantization instrument for quantized parameters relating to audio signal decoding consists of: a receiver to receive at least the first quantized parameter and a second quantized parameter; and a processor configured to dequantize the first quantized parameter according to a scalar quantization scheme of the first non-constant step size of the first, in order to obtain a dequantized first parameter. The size of the first non-constant step size of the first parameter is chosen such that a smaller step size is used for the range of first parameters where human speech is most sensitive, and a larger step size is used for the range of first parameters where human speech is less sensitive. The processor is configured to determine scaling factors based on the dequantized first parameter, and the processor is further configured for dequantizing the parameters. The second quantized value is based on a second quantization plan with a non-constant second step size in order to obtain the second dequantized parameter value. 4. The set of instruments of the third claim, in which the second quantization plan is one of the scalar or vector quantization plans.