Determining between scalar and vector quantization in higher order ambisonic coefficients

摘要

In general, techniques are described for coding of vectors decomposed from higher-order ambisonic coefficients. A device comprising a memory and a processor may perform the techniques. The memory may be configured to store audio data. The processor may be configured to determine whether to perform vector dequantization or scalar dequantization with respect to a decomposed version of the plurality of HOA coefficients.

主权项

1. A method of decoding a bitstream indicative of a plurality of higher-order ambisonic (HOA) coefficients representative of a soundfield, the method comprising:
obtaining, by an audio decoding device, the bitstream, wherein the bitstream includes a syntax element identifying whether the vector quantization or the scalar quantization was performed; performing, by the audio decoding device and based on the syntax element identifying whether the vector quantization or the scalar quantization was performed, either vector dequantization or scalar dequantization with respect to a spatial component defined in a spherical harmonic domain; reconstructing, by the audio decoding device, the plurality of HOA coefficients based on the dequantized spatial component; rendering, by the audio decoding device, one or more loudspeaker feeds based on the reconstructed plurality of HOA coefficients; and reproducing, by one or more loudspeakers coupled to the audio decoding device, the soundfield based on the one or more loudspeaker feeds.