Method and apparatus for determining the number of minimum integer bits required to represent non differential gain values for compression of HOA data frame representation

摘要

Problem to be solved: to provide a method and an apparatus for determining the number of minimum integer bits required for expressing non differential gain values for compression of HOA data frame representations.When compressing the Hoa data frame representation, gain control (15, 151) is applied to each channel signal before (16) the channel signals are selectively encoded.These gain values are transferred in a differential manner as side information.However, to start decoding of the compressed HOA data frame representation to be streaming, an absolute gain value is required, which should be encoded with a minimum number of bits.Such a minimum number of integer bits β In order to determine E), the Hoa data frame representation (C (k)) is rendered in the spatial domain to a virtual speaker signal on the unit sphere, and the Hoa component continues to normalize the directional signal data frame representation (C (k)).The minimum number of integer bits is β The set is set to e = log log2 (= log. Sub. -- log. Sup. 2 ({√ kmax}. O) + 1).Diagram