ITR DATA REPRODUCTION DEVICE, RECORDING/REPRODUCTION SYSTEM, AND INTERPOLATION FILTER

Title:

ITR DATA REPRODUCTION DEVICE, RECORDING/REPRODUCTION SYSTEM, AND INTERPOLATION FILTER

Document Type and Number:

WIPO Patent Application WO/2005/031738

Kind Code:

A1

Abstract:

There is provided an ITR (Interpolated Timing Recovery) data reproduction device capable of obtaining a preferable reproduction output waveform with least distortion and executing update of sampling timing at a high speed. Each sampling cycle (Ts) of an arbitrary interpolation function f(t) is divided into a plurality of periods. Each of the divided periods is subjected to linear interpolation and data at each interpolation point in the respective divided period is calculated. Moreover, as a quotient obtained by dividing the sampling timing by an integer at one sampling interval, only the integer-expressing portion of the binary number is extracted and input sampling data (Ds) of the corresponding number are acquired to the interpolation filter so as to perform pipeline operation. As a remainder value obtained when dividing the sampling timing by an integer at the one sampling cycle, only a digitized fraction-expressing portion of the binary number is extracted and the tap coefficient of the interpolation filter is decided by using the value as a sampling timing (μk).

Inventors:

HIGASHINO SATORU (JP)

Application Number:

PCT/JP2004/014681

Publication Date:

April 07, 2005

Filing Date:

September 29, 2004

Export Citation:

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Assignee:

SONY CORP (JP)
HIGASHINO SATORU (JP)

International Classes:

G11B20/10; H03H17/00; H03H17/06; H03L7/06; H04L7/02; H04L25/03; H04L25/497; (IPC1-7): G11B20/10; H03H17/00; H03H17/02; H04L7/033; H04L24/497

Foreign References:

JPH087489A	1996-01-12
JP2001184795A	2001-07-06
JP3255179B2	2002-02-12

Other References: