JPS6124063A - Digital recording and reproducing device of stereophonic sound - Google Patents

Abstract

PURPOSE:To reproduce L/R sterophonic sound signals at the same time by superimposing the L/R digital sound signals on a transmission line to transfer them. CONSTITUTION:The stereophonic sound is inputted separately for L/R and each is coded into 8 bits by A/D converting sections 7, 8 and 8-bit coders 9, 10. The coded data is synthesized into 16 bits by a bit converting section 11 and the high-order 8 bits are used as the L and the low-order 8 bits are used as the R data and then they are synthesized. The distinction whether the recorded sound signal is stereophonic or monaural is recorded as a code together with the sound signal. Thus, the data is transferred while using the same transmission line at the same time and simultaneous reproduction of L/R is attained easily.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention stores coded stereo audio signals in a storage device, the left channel (hereinafter referred to as "hereinafter"), the right channel's conventional configuration and its problems. Conventionally, in order to encode and record/playback, the first
As shown in the figure, it handled monaural audio signals.

In the figure, an audio signal is digitally converted and encoded into 8 bits by an A/D converter 1 and an 8-bit encoder 2 (the example shows a case where the signal is encoded into 8 bits, but any number of bits may be used). are combined as upper and lower data by the bit converter 3 and stored directly in 4'A as 16-bit data. It will be recorded.

During playback, audio data is read from the storage device 4, divided into upper and lower 8 bits by the bit converter 6, and converted into D/
The A converter 6 performs D/MU conversion and outputs it as an audio signal. If a magnetic disk or the like is used as the storage device 4, -
Since the data length for each data transfer is fixed, −
Data transfer is required multiple times for each recording/playback.

When the conventional method is used for stereo audio signals, since L and R are recorded separately, it becomes complicated to play back L and R simultaneously, such as by adjusting the playback start timing during playback.

OBJECTS OF THE INVENTION It is an object of the present invention to eliminate the above-mentioned conventional drawbacks and to simultaneously reproduce I and -R stereo audio signals.

Structure of the Invention In order to achieve the above object, the present invention applies a recording and reproducing method for monaural audio signals, and simultaneously reproduces digital audio signals by superimposing and transmitting R on the same transfer path. By inputting a monaural audio signal in either L or single mode, the effect of being able to record and reproduce it as a monaural audio signal is obtained.

DESCRIPTION OF EMBODIMENTS FIG. 2 shows an embodiment of the present invention. As shown in FIG. 2, stereo audio is input separately for R and is encoded into 8 bits each by A/D converters 7 and 8 and 8-bit encoders 9 and 10 (encoding (The number of bits to be focused on can be any number of focus points.) The encoded data is sent to the bit converter 1
1, it is synthesized into 16 bits, but unlike the monaural case, the upper 8 bits are synthesized as L (or R) data and the lower 8 bits are synthesized as R (or L) data. If the input is monaural audio, stereo/monaural signal 1
6, the upper and lower parts are alternately synthesized as in the conventional case.

Whether the recorded audio signal is stereo or monaural is recorded as a code at the same time as the audio signal.

When reproducing, the 16-pinot data read from the storage device 12 is divided by the bit converter 13 into data with the upper and lower 8 bits being L (or R) and the lower 8 bits being R (or L), and the data is divided into 14 degrees. The signal is output as an audio output through 16 D/A converters.

According to the above configuration, unlike the conventional case, data transfer is performed simultaneously using the same transfer path, so that one
．． -H can be played simultaneously. In the case of a monaural audio signal, the bit converter 13 alternately converts the upper and lower A/
It is output through the D converter.

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, the following effects can be obtained by recording and reproducing stereo digital audio data as one piece of R-combined data.

(a) Simultaneous reproduction of stereo digital audio and R is facilitated.

(b) Even if the input audio signal is monaural,
Recording and reproduction can be performed in the same manner as before using external control signals.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a conventional monaural audio digital recording/reproducing apparatus, and FIG. 2 is a block diagram of a stereo audio digital recording/reproducing apparatus according to an embodiment of the present invention. 7.8...A/D conversion section, 9,1o...
・8-bit encoding unit, 11...bit conversion unit,
12...Storage device, 13...Bit converter, 14.16...D/MU converter. Name of agent: Patent attorney Toshio Nakao and one other person Figure 2

Claims (1)

[Claims] A/D converts stereo analog audio signals to digital
It consists of a conversion section, a storage device section for recording stereo digital audio signals, a D/A conversion section for converting digital audio signals into analog signals, and a control section for controlling each of the above sections. A stereo audio digital recording/reproducing device characterized by transmitting channel signals simultaneously in a superimposed manner on the same transfer path.