JPS6276045A - Automatic program search signal recording device - Google Patents

Abstract

PURPOSE:To record automatically information representing inter-music or information representing the head of music by supervising a level of a recording sound signal so as to detect the inter-music thereby inserting the information representing the inter-music or the information representing the information of the head of music into the recording sound signal. CONSTITUTION:When a level detector 141 of an inter-music detection section 14 detects a low amplitude level on the way of a music (a), a low level signal is outputted to a time detector 142 during a detection period t1. A time detector 142 is set sot as to be operated after a low level signal is consecutive for a time (t) and since the relation of t1<t exists, the detector 142 is not operated. When the music (s) is finished and its amplitude level gets smaller, a long low level signal is outputted to the time detector 142. The time detector starts its operation after the time (t), counts the period of the low level signal and outputs a low level signal informing that the present period is a no-signal period to a CPU 8, which recognizes that the present period inter-musics (a, b).

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an automatic cue signal recording device for an audio recording/playback device.

[Technical day before the invention] Conventionally, in an audio recording and reproducing device, in order to record information indicating the beginning of a song and information indicating the beginning of a song without indicating the interval between songs, a signal indicating the above information is generated one by one by operating an external switch or the like. Song 1j! ] had to be recorded.

[Problems with Background Art] In the conventional method as described above, when recording many songs continuously from an LP record, etc., it is necessary to input the information signal by operating an external switch between the many songs that occur ( ), which has the drawback of requiring 11) time and effort to perform this work.

[Object of the Invention] The object of the present invention is to overcome the above-mentioned drawbacks and provide an automatic cue recording device No. 13 that automatically records information indicating the intervals between songs or the beginning of the songs between the songs. It is in.

[Summary of the Invention] The present invention detects a song interval by monitoring the level of a recorded audio signal, and when the song interval is detected, it detects the song interval and adds information or information indicating the Dfl of the song to the recorded audio signal. By inserting it into the above, the above purpose is achieved.

[Embodiment of the Invention] An embodiment of the present invention will be described below with reference to FIG. i7i'i. FIG. 1 is a block diagram showing an embodiment of the Ming's white command signal recording device in Book 5. stomach[! shi, this example is 8
This example shows an example in which an automatic cue recording device vj is incorporated into a 1MIVTR (video tape recorder) or the like. 1 is an audio signal input terminal 1, and the input analog audio signal is subjected to JH width compression by the noise rig converter circuit 2, and then
) is converted into a 10-bit digital audio signal by the D/to converter 3. This digital audio signal is converted into an 8-bit digital signal by a converter 4 to a pin 1, and is input to a main processor 5. Conversely, the 8-bit digital audio signal output from the main processor 5 is converted into a 10-bit digital signal by the bit converter 4, and then converted into analog audio by the A/D and D/A converter 3. converted into a signal. This atlog digital Shinkyu (after the amplitude is expanded by the Yunoise reduction circuit 2,
It is output from the audio output terminal 6. Mainbu [Rubituri 5
1 is an A/D data interface 51, an ID data interface 52, and a PCM'7 connected to the common bus 5G.
It has a '-fintaface 53 and a σ parity arithmetic/error correction section 54, and a 2-byte data storage RAM 15 is connected to the common lot 56.

The ID data interface 514 inputs and outputs audio digital data to the bit converter 4, and the ID data interface 52 inputs and outputs ID data to the CPU.
The PCM data interface 53 applies an error correction code to the digital audio signal input via the video data interface 51 via the interface 9S. etc. and convert it into PCM, PCM data ink face 53
performs error correction and edge padding of the PCM audio signal input via the PCM audio signal. 2, the byte data RAM 15 stores input digital three-voice signals, PCM audio signals, and the like.

Interface 9 connects v −r via buffer 'IO
VT is sent to the signal recording system 12 of r< via buffer/'10.
It is connected to the R signal reproduction system 13. Further, a detection signal from a song interval detection section 14 that detects a song interval of the analog audio 1iQ input from the input terminal 1 is input to the CPU.

FIG. 2 is a block diagram showing a detailed example of the song interval detection section 14 shown in FIG. 1. A level detector 141 detects the level of an analog audio signal input by the song interval detection unit 141.
Quim i'A to detect the duration of a predetermined level:b
'5142.

Next, the operation of this embodiment will be explained. O; 1: Analog signal input from child 1"; IJ, after being amplitude-compressed by noise control circuit 2, 810
, D/A 21% converter 3 converts into digital blue img of 10 pitches 1 to 1. This 10-bit digital τ signal is converted into a digital high-pitched voice (13g) of 8 bits 1 to 1 by converter 4, and then the main processor 1 to 5 A
/D data is stored in the data RAM 15 through the data interface 1-2 via the data interface 1-51. The valid performance seller correction unit 54 stores the byte data once in the RAM 15 in 2.
；Sequential error correction codes are added to the digital audio signal and P
CM, and outputs this PCM audio signal to the ink face 9 via the PCM data ink face 53. The PCM audio signal input to this interface 9 becomes a recording signal and is outputted to the signal recording system 12 via buffers 1 and 10. A signal recording system 12 records this recording signal on a tape. Next, the PC recorded on the tape
The M audio signal is reproduced by the signal reproduction system 13 and inputted to the PCM data interface 53 of the main processor 5 via the buffer 11 and the interface 9. PCI
PCN input from VI data interface 53
The 4g-resignal is stored in the data RAM 15 through the pie 1 at -F12. The parity performance Yuyler correction unit 54 performs error correction on the digital audio signal based on the PCM audio signal from the -q accumulated 2, pi 1 to data RΔM 15, and sends this digital )'fi voice signal to the A/D data interface 51. The output signal is output to the bit converter 4 via the bit converter 4. The conversion process converts the input 8-bit digital audio signal into 1
Converts to 0-bit digital audio signal and converts it to A/D
, output to the D/A converter 3. The blue signal converted into an analog audio signal by the A/D SD/A converter 3 is amplitude-expanded by the noise reduction circuit 2 and then output from the terminal 6.

When recording the PCM-converted Takayama signal, the song interval detection section 14 detects the song interval of the analog audio signal input from the terminal 1 and informs the CPU of this. This song interval detection section 14
1. First, the operation of the song interval detection section 14 will be explained in more detail.
The level detector 141 inputs an analog audio signal as shown in FIG. 3(A), and when it detects a low amplitude level part in the middle of song a, for example, as shown in FIG. A low level signal is output to the time detector 142 for the detection period ↑1. The time detector 142 is set to operate for the first time after the low level signal input from the level detector 141 has continued for, for example, t time 43. Since ti<t in this case, the time detector 142 is immobile. After that, when song a ends and the amplitude level of the next song becomes small, the level detector 141LJ detects this and sends a fairly long low level g to the time detector 1.LJ as shown in FIG. 42. When the time detector 142 inputs this low level 15g, it outputs the signal shown in FIG.
As shown in FIG. 3(C), the operation is started tJ, 1 time after this input point, and the period of the low level signal output by the level detector 141 is 51 o'clock, and the current state is as shown in FIG. 3(C). Outputs a low level g to CP tJ 8 to inform that it is a non-trust period.
8 Recognizing that the current position is between songs a and b in Figure 3 (A), select
An information signal indicating the beginning of the song or information indicating the beginning of the song is output to the D data interface 52 via the CP LJ interface 7. As a result, the information 9k indicating the interval between songs or the information indicating the beginning of the song is entered into the ID data portion of the audio data currently converted into 1DCM, and this is output via the PCM data interface 53.

Next, the CPU 8 of the signal reproduction unit performs the I/I in the PCM audio signal.
When detecting the signal "i) indicating the interval between songs in the D data section or the beginning of the song 113 (data 10) via the ID data interface 52 and CPIJ interface 7,
Based on this signal, the CPU 8 can perform a head start operation.

FIG. 4 is a block diagram showing an outline of the embodiment of the present invention. Input the plank key g100 from the song interval detection section (shown in the figure), etc., and input the counter 1G. This counter 16 increments the counter 1 to 1 by one every time this blank message 8100 is input. 21-7-Itsugu is recorded on the PCM-converted old voice Ikoshi as a message indicating the interval between songs or the beginning of the song.As a result, , 1. By detecting the above 10 information non-bars, it is possible to locate the beginning of a specific song.

[Effect of the invention] As described above, the automatic cue entry 'j, A' of the AX invention
According to the r% setting, the interval between songs is detected by monitoring the level of the recorded high-pitched voice signal, and when this interval is detected, the interval is recognized and the information is recorded. By going into the middle of the song, it is possible to automatically record the information from the beginning of the song or the beginning of the song.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an example of the automatic cue signal recording device of the present invention;
A block diagram showing a detailed example of the 7n detection section, FIG.
What is the operation timing of the song interval detection section 14 shown in the figure? -1～
, FIG. 4 shows another embodiment of the present invention! ! ■
Approximately zo [-179 figure. 3...A/D, D/' Moxibustion to eight changes: Raku 5...
Main program [Rulli 8...CPU 12
... Signal record 1≠ system 14... Song listening 11" part
1/11...Level detector 142...Time (Shipping equipment fee J Kojin buj JII!± 1 Kawa Chika jS1
Identification) t) HiroFig. 2 Fig. 3 Fig. 4

Claims (1)

[Claims] 1) In an audio signal recording and reproducing device, a song interval detection means detects a gap between recorded songs by monitoring the amplitude level of a recorded audio signal, and when an interval is detected, a song interval detecting means detects a gap between recorded songs. 1. An automatic cue signal recording device comprising a recording control means for inserting and recording information indicating the beginning of a cue. 2) When the audio signal recording and reproducing device is a digital audio signal recording and reproducing device, the automatic beginning according to claim 1, wherein information indicating the beginning of the song is recorded as index data. Output signal recording device.