Title:
AUDIO ENCODER, AUDIO ENCODING METHOD AND AUDIO ENCODING SIGNAL RECORDING MEDIUM
Document Type and Number:
Japanese Patent JP3518737
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an audio encoding method that uses window functions to conduct overlap encoding.
SOLUTION: In the audio encoding method that uses at least 4 kinds of window functions of a long window, a short window, a start window, an a stop window to conduct overlapping encoding, the long window or the start window of the window function at the start of encoding is used by taking the matching performance of codes into account, the long window or the stop window is used for the window function at the end of encoding to decide the window function, the window function is multiplied, its output is converted from a time axis into a frequency axis, data are encoded so that a virtual buffer value of a frame at the start of encoding and a virtual buffer value of a frame at the end of encoding are the same specified value so as to enhance the matching performance of the codes.
Inventors:
Arakage, Kazumi
Application Number:
JP30209499A
Publication Date:
April 12, 2004
Filing Date:
October 25, 1999
Export Citation:
Assignee:
VICTOR CO OF JAPAN LTD
International Classes:
G10L13/07; G10L19/025; H03M7/30; H04B14/04; (IPC1-7): H03M7/30; G10L13/06