Enhanced coding of high-frequency tonal components in MPEG-D USAC through joint application of ESBR and sinusoidal modeling

The new eSBR tool of MPEG-D Universal Speech and Audio Coding offers a great advantage in compression of high frequency content, however it produces audible artifacts for sounds whose pitch frequencies are strongly variable or exceeding the split frequency of eSBR. We propose an extension of the forthcoming standard by adding a high frequency sinusoidal tool. This tool introduces additional parametric information to the data bitstream in order to encode the challenging tonal components which are excluded from eSBR processing. Listening tests demonstrate benefits of the proposed approach for test items of strongly tonal character.