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1. WO1996012270 - TIME COMPRESSION/EXPANSION WITHOUT PITCH CHANGE

Publication Number WO/1996/012270
Publication Date 25.04.1996
International Application No. PCT/US1995/014631
International Filing Date 12.10.1995
Chapter 2 Demand Filed 12.04.1996
IPC
G11B 20/00 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
20Signal processing not specific to the method of recording or reproducing; Circuits therefor
H04B 1/66 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
1Details of transmission systems, not covered by a single one of groups H04B3/-H04B13/123; Details of transmission systems not characterised by the medium used for transmission
66for reducing bandwidth of signals; for improving efficiency of transmission
CPC
G10L 21/04
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
21Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
04Time compression or expansion
G11B 20/00007
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
20Signal processing not specific to the method of recording or reproducing; Circuits therefor
00007Time or data compression or expansion
H04B 1/662
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
1Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
66for reducing bandwidth of signals; for improving efficiency of transmission
662using a time/frequency relationship, e.g. time compression or expansion
H04N 21/4126
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
21Selective content distribution, e.g. interactive television or video on demand [VOD]
40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
41Structure of client; Structure of client peripherals
4104Peripherals receiving signals from specially adapted client devices
4126The peripheral being portable, e.g. PDAs or mobile phones
H04N 21/4147
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
21Selective content distribution, e.g. interactive television or video on demand [VOD]
40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
41Structure of client; Structure of client peripherals
414Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
4147PVR [Personal Video Recorder]
H04N 21/42204
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
21Selective content distribution, e.g. interactive television or video on demand [VOD]
40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
41Structure of client; Structure of client peripherals
422Input-only peripherals ; , i.e. input devices connected to specially adapted client devices; , e.g. global positioning system [GPS]
42204User interfaces specially adapted for controlling a client device through a remote control device; Remote control devices therefor
Applicants
  • PIXEL INSTRUMENTS [US]/[US]
Inventors
  • COOPER, J., Carl
  • ANDERSON, Steve
Agents
  • LIGHTBODY, William
Priority Data
08/322,06912.10.1994US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) TIME COMPRESSION/EXPANSION WITHOUT PITCH CHANGE
(FR) EXPANSION/COMPRESSION DE LA DUREE SANS VARIATION DE LA HAUTEUR DU SIGNAL
Abstract
(EN)
An apparatus and method are disclosed for converting an input signal (10) having a frequency related information sustained over a first duration of time into an output signal (100) sustained over a second duration of time at substantially the same first frequency by adding or subtracting to the effective wavelength (113) of the output signal (100). Preferably, the signals are converted in digital form with samples added or subtracted to frequency convert the signal.
(FR)
Un appareil et un procédé permettent de convertir un signal d'entrée (10), comportant des informations liées à la fréquence, correspondant à une première durée, en un signal de sortie (100) correspondant à une deuxième durée, à une fréquence sensiblement égale, par addition ou soustraction portant sur la longueur (113) d'onde efficace de ce signal de sortie (100). Ces signaux sont de préférence numérisés, et des échantillons ajoutés ou soustraits pour convertir la fréquence d'un signal à l'autre.
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