Data receiver for receiving code signals having a variable data rate
First Claim
1. A data receiver for receiving code data having a variable data rate and encoded with any one of a plurality of data rates and then repeated in accordance with the respective data rates to be provided with a same data rate thereby, and for restoring, frame by frame, the code data received to data having original data rates, said data receiver comprising:
- data rate detecting means for sequentially receiving one frame of the code data having the same data rate at a time, and detecting the data rate of the one frame of the code data assigned before repetition of the code data;
data rate restoring means for restoring, based on the data rate detected by said data rate detecting means, the one frame of the code data to the data having the original data rate; and
data reproducing means for reproducing an original signal out of the code data restored by said data rate restoring means;
said data rate detecting means comprising;
calculating means for calculating autocorrelation functions of the one frame of the code data to thereby determine how many times the code data have been repeated; and
deciding means for determining the data rate of the one frame of the code data assigned before the repetition on the basis of a characteristic of the data rate in the autocorrelation functions;
said data rate restoring means and said data reproducing means each performing respective processing on the basis of the data rate determined by said deciding means.
2 Assignments
0 Petitions
Accused Products
Abstract
A data receiver receives code data having a variable data rate and encoded with any one of a plurality of data rates and then repeated in accordance with the respective data rates to be provided with the same data rate thereby, and restores, frame by frame, the received code data to data having original data rates. The receiver has a data rate detecting circuit which sequentially receives one frame of code data having the same data rate at a time, and detects the data rate of the code data assigned before the repetition. A data rate restoring circuit restores, based on the detected data rate, the frame of code data to the data having the original data rate. A data reproducing circuit reproduces the original signal out of the code data restored by the data rate restoring circuit. The data rate detecting circuit has a calculating circuit for calculating the autocorrelation functions of the frame of code data to thereby determine how many times the code data have been repeated, and a decision circuit for determining the data rate of the frame of code data assigned before the repetition on the basis of the characteristic of the data rate in the autocorrelation functions. The data rate restoring circuit and data reproducing circuit perform the respective processings on the basis of the determined data rate.
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Citations
14 Claims
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1. A data receiver for receiving code data having a variable data rate and encoded with any one of a plurality of data rates and then repeated in accordance with the respective data rates to be provided with a same data rate thereby, and for restoring, frame by frame, the code data received to data having original data rates, said data receiver comprising:
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data rate detecting means for sequentially receiving one frame of the code data having the same data rate at a time, and detecting the data rate of the one frame of the code data assigned before repetition of the code data; data rate restoring means for restoring, based on the data rate detected by said data rate detecting means, the one frame of the code data to the data having the original data rate; and data reproducing means for reproducing an original signal out of the code data restored by said data rate restoring means; said data rate detecting means comprising; calculating means for calculating autocorrelation functions of the one frame of the code data to thereby determine how many times the code data have been repeated; and deciding means for determining the data rate of the one frame of the code data assigned before the repetition on the basis of a characteristic of the data rate in the autocorrelation functions; said data rate restoring means and said data reproducing means each performing respective processing on the basis of the data rate determined by said deciding means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification