DE2800387A1 - Recording system for acoustic signals - has analysed signals entered into digital memory and synthesised for replaying - Google Patents

Abstract

The recording of acoustic signals, e.g. speech, music, etc., is effected by using a digital memory. The generated signals are subjected to an analysis process, e.g. Fourier analysis, and the information entered into a memory. The data is converted into harmonic form in a synthesis process for replaying. The system is designed to avoid the problems associated with tape, disc, film etc. the analyser (1) is connected directly with the store (2) which is connected to the synthesises (3). Stereo signals may be fed to two loudspeakers (4, 5).

Description

DEVICE FOR STORAGE AND GENERATION

ACOUSTIC SIGNALS, IN PARTICULAR LANGUAGE AND MUSIC, VIA FIXED STORAGE It is known to have acoustic signals on records, hand, film and the like, continuously to record (save) media passing through, and from there via corresponding Reinforcement and surrender. Recording and playback take place in the same way. disadvantage is the need for mechanical parts to move the dandes, the plate etc. and the cumbersome and time consuming access. Then there is the strong dependency the sound quality, the running accuracy, the risk of contamination of the sound carrier, the Sound pickup, tangling with tapes, damage, noise.

With the above-mentioned invention, the deficiencies mentioned can be avoided will.

Because the sound image through harmonic analysis into a number of sine waves can be decomposed, it is possible to reverse each sound by synthesizing each one To generate fundamental frequencies again. This is achieved through digital storage of the occurring fundamental tones, which when reproducing the corresponding frequencies by independent (I) Control commands are called.

There are also commands for volume and dynamics. It becomes every tone sequence as if broken down into individual snapshots in a time cartoon, which one after the other Sound and, usik go on.

Because of the great need for information come for this purpose in particular Bladder accumulators and similar efficient storage methods are considered, which in are able to save the information without consuming electricity. is correct the separate storage of tones and the calling commands.

In principle, the idea of the invention is based on the following statements explained.

The acoustic signal to be recorded, such as speech, music, noises is fed to the analyzer via a microphone or an electrical signal (ronband etc.). This breaks down the signal into individual sinusoidal oscillations according to the principle the harmonic analysis resp. Fourier analysis. The individual acoustic tones are sorted by frequencies with definition of volume and dynamics (getting stronger; weakening; constant) in the form of commands, which are saved in run in a quartz-supported common mode.

The playback takes place via a vibration generator, which the stored signals translated back into vibrations (tones) and translated into loudspeaker or synthesized electrical impulses, which largely correspond to the input acoustic Signals. The level of reproduction depends on the information density and the myriad of individual oscillations available in the analysis. The playback takes place at fixed frequencies regardless of the playback speed. In contrast a concept can be played faster or slower with dand or record without changing the pitch.

Only the notes themselves and the pauses are longer.

L e r s e i t e

Claims (1)

Claims: Device for storing and generating acoustic Signals, in particular of speech and music, characterized in that claim 1 the signals are not stored on a movable carrier such as a disk or a disk, but on a permanent memory entered and respeicherl similar to the calculator; will; Claim 2 facility according to claim 1, characterized in that the signals before their input to frequencies Lengths, volume and dynamics are analyzed; Claim 3 device according to claim 1 and 2 characterized in that the analysis values in the form of @ ommandos / control commands are recorded in the read-only memory; Claim 4 ffinrichtunq according to Claim 1 characterized in that a @ device is used for @playback, which the control @ commands translated into vibrations that are divided into frequencies, height, length, volume and dynamics synthesized to produce the original acoustic signal. Claim b Device according to Claim 1, characterized in that the generation of the vibrations in frequency and time sequence through @ u @ rz tuning is supported, whereby an optimal sound quality and clock accuracy is achieved which enables the interaction of several devices at the same time (multiplay, Copy, recording). Claim 6 device according to claim 1 further characterized in that the signals running next to one another are arranged one after the other by a converter allowing them to be sent via one or more channels uraht, radio or telegraph.