Digital data encoding apparatus and method thereof

Data processing: speech signal processing – linguistics – language – Speech signal processing – For storage or transmission

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

704230, 704219, 704500, 704501, G10L 914, G10L 916

Patent

active

058129820

ABSTRACT:
Digital data divided into blocks each having a predetermined number of samples is transformed into data on a frequency axis for each block to generate coefficient data for each frequency. Coefficient data of a predetermined number of blocks are stored in a buffer. From the buffer, coefficient data are inputted to a floating-point transforming circuit for each one block. The coefficient data are divided into a plurality of sub-bands, each sub-band including one or a plurality of coefficient data. The coefficient data are floating-point transformed for each sub-band and transformed into one sub-band common characteristic data which is common to the coefficient data included in each sub-band and mantissa data of the number equal to the number of coefficient data included in each sub-band. The sub-band common characteristic data and the mantissa data are stored in a memory. Sub-band common characteristic data of a predetermined number of blocks are read from the memory for each sub-band. One block-common characteristic data which is common to the read sub-band common characteristic data is generated. Coefficient data of a predetermined number of blocks are read from the memory for each sub-band. The read coefficient data is divided by an exponent expressed by the block-common characteristic data to generate new mantissa data.

REFERENCES:
patent: 5294925 (1994-03-01), Akagiri
patent: 5369724 (1994-11-01), Lim
patent: 5394508 (1995-02-01), Lim
patent: 5625746 (1997-04-01), Lim
patent: 5642111 (1997-06-01), Akagiri
Chen et al. "Sub-Band Coding of Audio Using Recursively Indexed Quantization." Applications of Signal Processing to Audio and Acoustics, 00, 1995.
Furui et al., Advances in Speech Signal Processing, Marcel Dekker, Inc., pp. 109-141, 1991.
Princen et al., Analysis/Synthesis Filter Bank Design Based On Time Domain Aliasing Cancellation, IEEE Transaction on Acoustic, Speech, and Signal Processing, ASSP-34, No. 5, pp. 1153-1161, Oct.1986.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Digital data encoding apparatus and method thereof does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Digital data encoding apparatus and method thereof, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital data encoding apparatus and method thereof will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1635101

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.