Patent · US Active

Method and apparatus for determining for the compression of an HOA data frame representation a lowest integer number of bits required for representing non-differential gain values

US10236003B2 · kind B2 · utility

4Cited by

5References

18Claims

0Family size

Assignee

Dolby Laboratories Licensing Corporation · US

Inventors

Sven Kordon · Wunstorf, DE
Alexander Krueger · Burgdorf, DE

Key dates

Filing date	Jun 22, 2015
Grant date	Mar 19, 2019
Priority date	—
Expiry date	Jun 22, 2035

Classification

Technology area (CPC H)Electricity
CPC primaryH04S2420/11
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

When compressing an HOA data frame representation, a gain control (15, 151) is applied for each channel signal before it is perceptually encoded (16). The gain values are transferred in a differential manner as side information. However, for starting decoding of such streamed compressed HOA data frame representation absolute gain values are required, which should be coded with a minimum number of bits. For determining such lowest integer number (βe) of bits the HOA data frame representation (C(k)) is rendered in spatial domain to virtual loudspeaker signals lying on a unit sphere, followed by normalization of the HOA data frame representation (C(k)). Then the lowest integer number of bits is set to: (AA).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.