Title:
DATA REPRODUCTION DEVICE
Document Type and Number:
Japanese Patent JP3300212
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To reduce a circuit scale and power consumption by executing a bus boosting processing in a low sampling frequency when data is divided into frequency bands.
SOLUTION: Frequency-time base converters 6-1 to 6-3 input spectrum data which are divided and compressed for the respective frequency bands of H, M and L bands and output data on respective time bases. The sampling frequencies of output data on the time bases of the H, M and L bands are Fs/2, Fs/4 and Fs/4 when the sampling frequency of data recorded in a disk is set to be Fs, and they are expanded/synthesized in synthesis filters 6-5, 6-6. Bus boosting LPF 6-7 executes the burst boosting processing on low frequency band data of the L band, which is from the frequency-time base converter 6-3, in the state of the sampling frequency Fs/4, and it sends data to an adder 6-9 through an over-sampling circuit 6-10.
Inventors:
Takeshi Tanaka
Application Number:
JP30720395A
Publication Date:
July 08, 2002
Filing Date:
November 27, 1995
Export Citation:
Assignee:
Sharp Corporation
International Classes:
G11B20/10; G10L19/00; G10L19/02; G11B20/00; H03G7/00; H03K9/06; H03M7/30; (IPC1-7): H03M7/30; G10L19/00; G11B20/00; G11B20/10; H03G7/00
Domestic Patent References:
| JP6348295A | ||||
| JP7202821A | ||||
| JP1160717U |
Attorney, Agent or Firm:
Shizuo Sano