Real time audio encoding/decoding system using MPEG-H 3D Audio toward advancement of terrestrial broadcasting technology

摘要

Aiming to enhance the audio service of terrestrial broadcasting, it is considered that a broadcasting system is migrated to an object-based sound system. The object-based sound system in broadcasting is required to (i) deal with audio metadata to control audio data, (ii) consist of highly efficient audio coding, and (iii) be equipped with a rendering feature capable of incorporating a viewer's preferences into audio playback. To meet such requirements, a real time audio encoding/decoding system (codec) using Moving Picture Experts Group (MPEG)-H 3D Audio (3DA) was developed. The developed audio codec supports up to 24 channels of back ground sound with 32 additional audio objects. These audio data are input into the audio codec along with the audio metadata in a serial representation of the Audio Definition Model (S-ADM). The renderer implemented in the audio codec renders decoded audio data into popular audio formats such as 22.2 ch, 7.1.4 ch, 5.1 surround and stereo. Dialogue enhancement and dialogue replacement functions are also made available by the renderer. A music program and sports program were produced to verify the effect of the object-based sound system.