TH2501002016A - 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 method for decoding audio encoded in an audio decoder consists of: obtaining at least the quantized first and second parameters; dequantizing the quantized first parameter using a scalar quantization plan of magnitude one with a non-constant first step to obtain the dequantized first parameter, where the magnitude of the non-constant first step is chosen such that a smaller step is used for the range of first parameters where human hearing is most sensitive, and a larger step is used for the range of first parameters where human hearing is less sensitive; determining a scaling factor based on the dequantized first parameter; dequantizing the quantized second parameter using a non-constant second step quantization plan of magnitude two to obtain the dequantized second parameter. And the decoding of the encoded audio is based on scaling factors and parameters, with the second value being dequantized. 2. The method of claim 1, where the second quantization plan is one of the scalar or vector quantization plans. 3. The decoding machine for the encoded audio consists of: a receiver to receive at least the first quantized parameter and the second quantized parameter; and a processor configured to dequantize the first quantized parameter using a scalar quantization scheme of the first map with a magnitude of the first non-constant step, in order to obtain the dequantized first parameter. The magnitude of the first non-constant step is chosen such that a smaller step is used for the range of first parameters where human speech is most sensitive, and a larger step is used for the range of first parameters where human speech is less sensitive. The processor is configured to determine the scaling factor based on the dequantized first parameter. The processor is further configured to dequantize the second quantized parameter using a second quantization scheme of the second non-constant step, in order to obtain the second dequantized parameter. Dequantization is the process by which the processor is further configured to decode the encoded audio based on a scaling factor and a second, dequantized parameter. 4. The set of instruments of the third claim, in which the second quantization plan is one of the scalar or vector quantization plans.