Stereo decoding system capable of reducing the phase shift during the signal transforming
AssigneeMediatek Inc.
InventorsHsiang-Hui Chang, Chih-Chien Huang, Chieh Hung Chen
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Abstract
A stereo decoding system comprises an oscillator, a bandpass filter, a PLL unit and a stereo decoder. The oscillator generates a first signal with a center frequency. The bandpass filter receives a stereo multiplexed signal and the first signal to filter out a pilot signal. The PLL unit receives the pilot signal to generate a PLL output signal. The stereo decoder receives the stereo multiplexed signal and the PLL output signal to separate a left channel signal and a right channel signal from the stereo multiplexed signal.
Claims28
A stereo decoding system, comprising:
- an oscillator generating a first signal with a center frequency;
- a bandpass filter receiving a stereo multiplexed signal and the first signal to filter out a pilot signal;
- a PLL unit receiving the pilot signal to generate a PLL output signal, wherein the PLL output signal is locked by the PLL unit with respect to the pilot signal;
- and
- a stereo decoder receiving the stereo multiplexed signal and the PLL output signal to separate a L channel signal and a R channel signal from the stereo multiplexed signal.
A stereo decoding system, comprising:
- a bandpass filter receiving a stereo multiplexed signal and a first signal with a center frequency to filter out a pilot signal;
- a PLL unit receiving the pilot signal to generate a PLL output signal and the first signal, wherein the PLL output signal is locked by the PLL unit with respect to the pilot signal;
- and
- a stereo decoder receiving the stereo multiplexed signal and the PLL output signal to separate a left channel signal and a right channel signal from the stereo multiplexed signal.
A stereo decoding method, comprising:
- receiving a stereo multiplexed signal;
- determining a first signal with a center frequency of a bandpass filter;
- filtering out a pilot signal from the stereo multiplexed signal by the bandpass filter according to the center frequency;
- providing a PLL unit to generating a PLL output signal based on the pilot signal;
- and
- providing a stereo decoder receiving the stereo multiplexed signal and the PLL output signal to separate a left channel signal and a right channel signal from the stereo multiplexed signal.
Dependencies are inferred from the claim text.