Dolby Laboratories Licensing Corporation

Dolby International Ab

Xuemei Yu

Per Ekstrand

C Phillip Brown

Zhiwei Shuang

Stewart Murrie

Yuxing Hao

Ziyu Yang

Guiping Wang

Qingyuan Bin

Daniel Paul Darcy

Libin Luo

Zilong Yang

A method of enhancing dialog intelligibility in an audio signal, comprising determining a speech confidence score that the audio content includes speech content, determining a music confidence score that the audio content includes music correlated content, in response to the speech confidence score, and applying a user selected gain of selected frequency bands of the audio signal to obtain a dialogue enhanced audio signal. The user selected gain is smoothed by an adaptive smoothing algorithm, an impact of past frames in said smoothing algorithm being determined by a smoothing factor, the smoothing factor being calculated in response to the music confidence score, and having a relatively higher value for content having a relatively higher music confidence score and a relatively lower value for speech content having a relatively lower music confidence score, so as to increase the impact of past frames on the dialogue enhancement of music correlated content.

Dialog enhancement using adaptive smoothing which depends exponentially on a smoothing factor

A method of audio processing includes generating harmonics in a hybrid complex quadrature mirror filter domain. Generating the harmonics may include multiplication, using a feedback delay loop, and dynamic compression. The harmonics may be generated based on one or more hybrid sub-bands of the complex transform domain signal.

Bass enhancement for loudspeakers

A method for steering binauralization of audio is provided. The method comprises steps of: receiving () an audio input signal, calculating () a confidence value indicating a likelihood that a current audio frame of the audio input signal comprises binauralized audio; determining () a state signal based on the confidence value; determining () a steering signal, based on the first confidence value, the state signal and an energy value of the audio frame; and generating () an audio output signal with steered binauralization by processing the audio input signal according to the steering signal.

Steering of binauralization of audio

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Beijing, China

Xuemei Yu