JPS6280850A - Automatic program search signal recorder - Google Patents

Abstract

PURPOSE:To record information representing inter-music space automatically by using a timer reservation means to operate an inter-music space detection means for a prescribed time at the setting time. CONSTITUTION:A timer 143 set with a reservation time operating the inter-music detection section 14 starts a level detector 141 and a time detector 142 when the reservation time comes. The detector 141 detects a low level of the inter- music space by the start and supplies an output to the detector 142, which outputs an inter-music space detection signal to a CPU8 when the low level detection is consecutive for a prescribed time. The CPU8 receives the inter-music space detection signal and outputs the information signal representing inter-music space to a main processor 5 via a CPU interface 7 and the processor 5 records the information representing the inter-music space onto a tape together with a PCM sound signal as ID data. Thus, the information the inter-music space is recorded automatically and the working time and man-hour are reduced.

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 complexity of the invention] Conventionally, in an audio recording and reproducing device, in order to record information indicating the question of a song and information indicating the beginning of a song, an external switch or the like is operated between songs to generate a signal indicating the above information one by one. are recorded between songs.

[Problems with the Background Art] In the conventional method described above, when recording many songs continuously from an LP record, etc., it is necessary to operate an external switch to input the above information signal between the many songs that occur. However, there was a drawback that this work required time and effort.

[Object of the Invention] In view of the above-mentioned drawbacks, an object of the present invention is to provide an automatic cue signal recording device that automatically records information indicating a song question or information indicating the beginning of a song between songs. .

[Summary of the Invention] The present invention detects a song question by monitoring the level of a recorded audio signal for a preset period of time, and when this song question is detected, information indicating the song question or information indicating the beginning of the song. The above object is achieved by automatically inserting the audio into the recorded audio signal.

[Embodiment of the Invention] An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure is a block diagram showing an embodiment of the automatic cue signal recording device of the present invention. However, this example shows an example in which an automatic cue recording device is incorporated into an 8s VTR (video tape recorder) or the like.

An audio signal inputted to an audio signal input terminal 1 is amplitude-compressed by a noise reduction circuit 2, and then converted into a 10-bit digital signal by an A/D and D/A converter 3. This audio digital signal is converted into an 8-bit digital signal by the bit converter 4, and is input to the 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 an analog audio signal by the D/A converter 3. is converted to After this analog digital signal is amplitude-expanded by the noise reduction circuit 2,
It is output from the audio output terminal 6. The main processor 5 includes an A/D data interface 51, an ID data interface 52, a PCM data interface 53, and a parity calculation/error correction section 54 connected to a common bus 56.
The common bus 56 is connected to a two-byte data storage RAM 15.

The A/D data interface 51 inputs and outputs audio digital data to and from the bit converter 4, and the ID data interface 52 configures a system controller of a video tape recorder, etc., inputs and outputs ID data via the CPLJ interface 7. Conducted with CPtJ8,
The PCM data interface 53 is connected to the signal recording system 12 and signal reproducing system 13 of the video tape recorder via the interface 9. Parity calculation error correction unit 5
4 adds an error correction code or the like to the digital audio signal input via the A/D data interface 51 to convert it into PCM, or performs error correction processing on the PCM audio signal input via the PCM data interface 53.

2, the byte data RAM 15 stores input digital audio signals, PCM audio signals, etc. The interface 9 is connected to the signal recording system 12 of the VTR via the buffer 10.
It is connected via a buffer 1 to a signal reproduction system 13 of a VTR. Further, the CPU 8 receives a detection signal from a song interval detection section 14 that detects a song question in an analog audio signal input from the input terminal 1.

FIG. 2 is a block diagram showing a detailed example of the song interval detection section 14 shown in FIG. 1. The song interval detection unit 14 includes a level detector 141 that detects the level of the input analog audio signal.
, a time detector 142 for detecting the period of low level duration of the audio signal, and a timer 143 for reserving the period for monitoring the level of the audio signal.

Next, the operation of this embodiment will be explained. The analog audio signal input from the eldest child 1 is amplitude-compressed by the noise reduction circuit 2, and then converted into a 10-bit digital audio signal by the A/I) and D/A converter 3. This one
The 0-bit digital audio signal is converted into an 8-bit digital audio signal by the bit converter 4, and then stored in the byte data RAM 15 via the A/D data interface 51 of the main processor 5. The parity calculation error correction unit 54 converts the digital audio signal once stored in the byte data RAM 15 into PCM by sequentially adding an error correction code, etc., and outputs this PCM encoded audio signal to the interface 9 via the tPcM data interface 53. do. The PCM audio signal input to this interface 9 becomes a recording signal and is output to a signal recording system 12 via a buffer 10. A signal recording system 12 records this recording signal on a tape.

Next, the PCM audio signal recorded on the tape is played back by the signal playback system 13, and then transferred to the buffer 11 and the interface 9.
The data is input to the PCM data interface 53 of the main processor 5 via the PCM data interface 53 of the main processor 5. PCM data interface 5
The pcMg voice signal set signal 2 input from 3 is stored in the byte data RAM 15.

The parity correction unit 54 performs error correction on the digital audio signal based on the once stored PCM audio signal in the 2-byte data RAM 15, and converts this digital audio signal into bits via the A/D data interface 51. Output to converter 4. In the bit converter 4, the input 8
The 10-bit digital audio signal is converted into a 10-bit digital audio signal, which is output to the AID and D/A converter 3. The audio signal converted into an analog audio signal by the AID, [)/A converter 3 is amplitude-expanded by the noise reduction circuit 2, and then outputted from the terminal 6.

Next, the operation of the song interval detection section 14 will be explained.

First, the timer 1 sets the reservation time to operate the song interval detection section 14.
Set to 43. For example, in the order shown in FIG.
-b), the timer 143 is set as shown in Figure 3 (8).
), the operation time of the song interval detection section 14 is set. In other words, period work 1, which is at a high level in Figure (B),
is the operating time of the song interval detection section 14, which is set to exactly cover the vicinity of the boundaries between the eight songs. When the timer 143 reaches the reserved time, the level detector 141 . Time detector 14? Start. As a result, the level detector 141 detects the low level between the songs a to d shown in FIG. 3(A), and outputs this to the time detector 142. When the low level detection continues for a predetermined period of time, the time detector 142 outputs a song interval detection signal to the CPU 8 as shown in FIG. 3(C). In response to this, the CPU 8 outputs an information signal indicating the beginning of the song or the song question to the main processor 5 via the CPU interface 7. As a result, the main processor 5 records, for example, information indicating the beginning of the song as ID data on the tape together with the PCM audio signal, as shown in FIG. 3(D).

Next, other embodiments of the present invention will be described. In this case, first, the timer 143 is programmed with a time to operate the inter-song detecting section 14 based on the approximate length of the song, and the inter-song detecting section 14 is
In order to avoid continuously detecting the narration part etc. after the song interval detection section 14 has been operated for a certain period of time, a reserved operation is performed to stop the operation of the song interval detection section 14.

The time during which the operation of the inter-song detection section 14 is stopped is set, for example, as shown in FIG.
) As shown in Fig. 4(B), the level detector 141 and the time detector 142 are shown at high level. The timer 143 is set to be in the operating state for the T1 period. FIG. 4(C) shows the level state of the analog audio signal input to the level detector 141. in this case,
There is a part in the middle of song a where the level becomes low, but at this time the level detector 141 is in a stopped state, so no detection operation is performed. Then, at time t1, the level detector 141
and time detector 142 are activated, and level detector 14 is activated.
1 detects a low level between songs a and b,
As shown by A in FIG. 4(D), a low level detection signal is output to the time detector 142.

As a result, if this detection state continues for a certain period of time or more, the time detector 142 sends a signal to the CPU indicating that it is between songs.
Output to a. In response to this, the CPU 8 outputs an information signal indicating the beginning of the song interval to the main processor 5 via the CPLI interface 7. Thereafter, as shown in FIG. 4(E), the timer 143 starts the level detector 141 and the time detector 142 at time t2, when the predetermined stop time of the inter-song detection section 14 comes. Suspended for 12 hours. This time t2 is the time when the song interval detection section 14 shown in FIG. The level detector 14 detects the narration part at the beginning of the song.
This prevents malfunctions that would be detected by 1.

According to the embodiment described above, since it is possible to automatically detect the song question and record information indicating the beginning of the song or the song question, it is possible to eliminate the time and question required to record the information.

Note that the level detector 141 and the time detector 142 are omitted, and the inter-song detection section 14 is configured with a timer 143, and the time question reserved by the timer 143 is, for example, shown in FIG.
:As shown, it is near the boundary of 8 songs, and this reservation time is C.
By notifying the PU 8, a signal indicating the beginning of the song may be recorded as shown in <8> of FIG.

As described above, the automatic cue recording device of the present invention detects a song question by monitoring the level of the recorded audio signal, and when this song question is detected, the song question starts. By inserting information indicating the beginning of the song or information indicating the beginning of the song into the recorded audio signal,
This has the effect of automatically recording the information indicating the song question or the beginning of the song.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the automatic cue signal recording device of the present invention, FIG. 2 is a block diagram showing a detailed example of the song interval detection section shown in FIG. 1, and FIG. FIG. 2 is an operation timing chart of the inter-song detection section, FIG. 4 is an operation timing chart showing another embodiment of the present invention, and FIG. 5 is an operation timing chart showing still another embodiment of the present invention. It is a chart. 3...A/D, D/A converter 5...Main processor 8-CPU 12...Signal recording system 14...Song interval detection section 141...
Level detector 142... Time detector 143...
...Timer agent Patent attorney Nori Ken Chika Hiroshi Uji Figure 2 Figure 3 WJ ℃ Figure 5

Claims (1)

[Claims] In the audio signal recording and reproducing device, there is provided an inter-song detecting means for monitoring the amplitude level of the recorded audio signal and detecting a difference between recorded songs, and detecting the beginning of the song between the songs when an inter-song is detected. 1. An automatic cue signal recording device comprising: a recording control means for inserting and recording information indicating a track; and a timer reservation activation means for operating the inter-track detection means for a predetermined time at a preset time.