Sampling frequency converter

Details Sampling frequency converter Sampling frequency converter

1993-09-14

1994-11-15

Mai, Tan V.

Boots, shoes, and leggings

G06F 1531

Patent

active

053654684

ABSTRACT:
A sampling frequency converter includes an oversampling circuit for oversampling an input sample train, a Random Access Memory (RAM), a write control circuit for writing oversampled data in the RAM with a clock synchronized with the oversampled data, a sampling frequency ratio measuring circuit for measuring a frequency ratio of a sampling frequency of the input sample train and a sampling frequency of an output sample train, a read control circuit for reading from the RAM the oversampled data used for obtaining interpolation data at two points before and after an output sample value which realizes the measured sampling frequency ratio by a polynomial interpolation, a polynomial interpolation circuit for obtaining the interpolation data at the two points by the polynomial interpolation on the basis of the oversampled data read from the RAM by the read control circuit, and a linear interpolation circuit for linear-interpolating between the polynomial interpolation data at the two points and thereby obtaining the output sample value realizing the sampling frequency ratio. The sampling frequency ratio measuring circuit may include a counter and a count outputting circuit which measures a count for plural word periods of the output sample and outputs this count as the measured value of the sampling frequency ratio.

REFERENCES:
patent: 4689759 (1987-08-01), Anouar et al.
patent: 4748578 (1988-05-01), Lagadec et al.
patent: 4953117 (1990-08-01), Lagadec
patent: 5212659 (1993-05-01), Scott et al.

Affiliated with

Also associated with

Rating

Sampling frequency converter does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sampling frequency converter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sampling frequency converter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1102863