公开(公告)号：DE602007001625D1

公开(公告)日：2009-09-03

申请号：DE602007001625

申请日：2007-04-27

Applicant: ST MICROELECTRONICS ASIA

Inventor： KURNIAWATI EVELYN ,  GEORGE SAPNA

IPC: G10L19/02 ,  G10L19/035

Abstract: The present invention discloses a process for encoding an audio data, an audio encoder for compressing uncompressed audio data, and an electronic device that is capable of encoding audio data in low power consumption. The electronic devices include audio player/recorder, PDA, pocket organizer, camera with audio recording capacity, computers, and mobile phones.

公开(公告)号：DE602007003057D1

公开(公告)日：2009-12-17

申请号：DE602007003057

申请日：2007-08-08

Applicant: ST MICROELECTRONICS ASIA

Inventor： KURNIAWATI EVELYN ,  KUAH KIM HANN ,  GEORGE SAPNA

IPC: G10L19/00 ,  G10L19/02

Abstract: Perceptual audio coder refers to audio compression schemes that exploit the properties of human auditory perception. The coder allocates the quantization noise below the masking threshold such that even with the bit rate limitation, the noise is imperceptible to the ear. These distortion and bit rate requirement makes the bit allocation-quantization process a considerable computational effort. One method includes incrementally adjusting a global gain according to a gradient. The gradient could be adjusted each time the number of bits used to represent a quantized value is counted. Another method includes limiting a rate controlling parameter to a predetermined number of loops. The method could also include deriving a global gain to ensure exit from the loop. Accordingly, embodiments of the present disclosure provide a fast and efficient method to derive the rate controlling parameter and can be applied to generic perceptual audio encoders where low computational complexity is required.

公开(公告)号：SG136836A1

公开(公告)日：2007-11-29

申请号：SG2006029227

申请日：2006-04-28

Applicant: ST MICROELECTRONICS ASIA

Inventor： KURNIAWATI EVELYN ,  GEORGE SAPNA

IPC: G10L19/02 ,  G10L19/035

Abstract: The present invention discloses a process for encoding an audio data, an audio encoder for compressing uncompressed audio data, and an electronic device that is capable of encoding audio data in low power consumption. Electronic devices include audio player/recorder, PDA, pocket organizer, camera with audio recording capacity, computers, and mobile phones.

公开(公告)号：SG144133A1

公开(公告)日：2008-07-29

申请号：SG2008001075

申请日：2008-01-02

Applicant: ST MICROELECTRONICS ASIA

Inventor： KURNIAWATI EVELYN ,  GEORGE SAPNA

Abstract: LOW POWER DOWNMIX ENERGY EQUALIZATION IN PARAMETRIC STEREO ENCODERS A method and audio device are presented that preserve mono energy during downmixing of a hybrid coding process of an audio signal. The method includes calculating a stereo scaling factor in a group level that is definable within a stereo band. The method may also include updating the stereo scaling factor using an update rate and synchronizing the update rate of a spatial parameter during a fast changing transient portion of the signal. A number of groups in a first stereo band may be greater than a number of groups in a second stereo band, and the first stereo band may be a lower frequency band than the second band or may be perceptually more important than the second band.