Patent ID: 8718285
Filing Date: 2014-05-06
Classification: H04L,H04M,H04R

Abstract:
1. A decoding device, comprising: an object decoding circuit which receives a plurality of pieces of coded acoustic information that was coded on an object basis and decodes the received coded acoustic information on an object basis to generate an acoustic signal from each piece of the coded acoustic information, the acoustic signal resulting from synthesizing one or more object signals; and a rendering circuit which positions, for each acoustic signal generated, a virtual sound source in a predetermined listening space, the virtual sound source being associated with one of the object signals included in the generated acoustic signal, wherein priority information indicating a priority of the acoustic signal is multiplexed with the coded acoustic information, and the rendering circuit determines, according to the priority indicated in the priority information, a size of an area of the predetermined listening space which is allocated to the acoustic signal, and positions, within the area allocated to the acoustic signal, the virtual sound source of each of the object signals included in the acoustic signal, the priority information is global gain information indicating a gain of down-mixing information in the object-based coding, and the priority is proportional to the gain, the coded acoustic information includes gain ratio information indicating a gain ratio of each of the object signals to the down-mixing information, and the object decoding circuit calculates, for each of the object signals, a product of a value of the global gain information and a value of the gain ratio information, and provides a value of the calculated product as second priority information for each of the object signals, and wherein each of the object signals is associated with one sound source in an acoustic space in which the coded acoustic information is coded on an object basis, the acoustic signal is a signal resulting from synthesizing the one or more object signals generated in the acoustic space, and the rendering circuit determines the size of the area so that a larger area is allocated to the acoustic signal with a higher priority.