Gerät zur Komprimierungsbestimmung eines Hoa Datenrahmens zur Darstellung einer Nächsten Ganzzahligen Bitzahl zur Darstellung nicht Differentieller Verstärkungswerte

Details

Veröffentlichungs-Nr.

EP4730327

Anmeldetag

22. Juni 2015

Veröffentlichung

22. April 2026

Rechtsraum

EP

IPC

H04S3/02, G10L19/008G10L19/008(THOMSON LICENSING et al.)

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 normalisation of the HOA data frame representation (C(k)). Then the lowest integer number of bits is set to β e = log 2 log 2 K MAX ⋅ O + 1 <img class="EMIRef" id="8c6844a6-496c-4cf1-b4ce-b2b1030ffff6-ia01" /> .

Anmelder

Firma

Dolby International AB

Land

🇮🇪 Irland