Sin embargo, con el desarrollo de MPEG-4 xHE-AAC, que es una implementación de MPEG Unified Speech and Audio Coding, el estándar DRM se actualizó y se reemplazaron los dos formatos de codificación de solo audio, CELP y HVXC.
However, with the development of MPEG-4 xHE-AAC, which is an implementation of MPEG Unified Speech and Audio Coding, the DRM standard was updated and the two speech-only coding formats, CELP and HVXC, were replaced.WikiMatrix WikiMatrix