SYSTEMS AND METHODS FOR SAMPLE RATE CONVERSION
First Claim
Patent Images
1. A system, comprising:
- a counter to count cycles of a clock signal in a sample period corresponding to a digital data stream by incrementing once for each clock cycle after a frame sync signal is received in the digital data stream; and
a data processor to convert the digital data stream from an input sample rate to a predetermined output sample rate based on the number of cycles counted in the digital data stream.
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Abstract
Systems and methods are provided for converting input data streams having variable input sample rates to an output sample rate, which systems and methods are used in processing the data streams. In one embodiment, a system includes a clock source, a counter configured to count cycles for a corresponding data stream, and a data processor. The data processor is configured to read the number of cycles counted by the counter between received frame sync signals and to convert the first data stream to the predetermined output sample rate based on the corresponding number of cycles counted.
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Citations
20 Claims
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1. A system, comprising:
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a counter to count cycles of a clock signal in a sample period corresponding to a digital data stream by incrementing once for each clock cycle after a frame sync signal is received in the digital data stream; and a data processor to convert the digital data stream from an input sample rate to a predetermined output sample rate based on the number of cycles counted in the digital data stream. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method comprising:
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receiving a clock signal and a digital data stream; counting a number of cycles of the clock signal in a sample period corresponding to the digital data stream by incrementing once for each clock cycle after a frame sync signal is received in the digital data stream; and converting the digital data stream from an input sample rate to a predetermined output sample rate based on the number of cycles counted in the digital data stream. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A digital audio amplification system, comprising:
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an audio signal path including at least a sample rate converter (SRC), an audio effects subsystem, a pulse width modulation (PWM) modulator, and an output stage; wherein SRC receives a digital data stream having an input sample rate, and outputs a digital data stream having a predetermined output sample rate based on a number of cycles counted in the received digital data stream between successive frame sync signals. - View Dependent Claims (14, 15, 16, 17)
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18. A sample rate converter, comprising:
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an input to receive a digital data stream having an input sample rate; and means for converting the digital data stream from the input sample rate to a predetermined output sample rate based on a number of cycles counted in the received digital data stream between successive frame sync signals. - View Dependent Claims (19, 20)
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Specification