JPH0422280B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an audio recorder that stores a code string of an input audio signal in a recording memory and decodes the code string to reproduce the audio signal.

(b) Prior art Conventional audio recorders are constructed of tape recorders that use magnetic tape to record analog signals. It was unsuitable for playback.

For this reason, an audio recorder has been developed that uses a randomly accessible semiconductor memory instead of a magnetic tape as a storage medium, records audio signals encoded in this memory, and can randomly decode and reproduce the audio signals.

However, even with such an audio recorder, when the audio is reproduced and output, the listener who listens to the audio does not know the playback time until the audio is finished, so there is no time to spare. This method is inconvenient, such as sometimes having to listen to the reproduced audio over a long period of time, or conversely, only being able to listen to the reproduced audio of short sentences when there is time to spare.

(c) Purpose of the Invention The present invention has been made in view of the above-mentioned disadvantages, and provides an audio recorder whose purpose is to notify the listener in advance of the playback time of the playback audio.

(d) Structure of the Invention In addition to the recording memory, the voice recorder of the present invention includes an announcement memory in which code strings of voice signals of announcements indicating various time lengths are stored in advance. At the same time, the code string of the announcement audio signal indicating the time length of the message is read out from the announcement memory and stored in the address area immediately before the address area of this message, and when played back. , prior to reproducing the audio signal of the message, an announcement indicating the time length of the message is reproduced and output.

(E) Embodiment FIG. 1 shows an embodiment of the audio recorder of the present invention. In the figure, 1 is a microphone that converts audio into an electrical audio signal; 2 is an input filter amplifier circuit that has the function of blocking high-frequency components above the audio band of the audio signal from the microphone 1; 3
is an A/D conversion circuit that samples the audio signal from the filter amplifier circuit 2 and encodes it into a PCM signal. Reference numeral 4 denotes a recording memory consisting of a randomly accessible RAM that stores the audio PCM signal obtained from the A/D conversion circuit 2. 5 is an A/D conversion circuit that decodes the PCM signal read from the recording memory 4 into an analog audio signal, and 6 is an output filter amplifier that has a function of blocking sampling noise of the audio signal from the A/D conversion circuit 5. The circuit 7 is a speaker that produces sound based on the audio signal from the filter amplifier circuit 6. Reference numeral 8 denotes an announcement memory consisting of a read-only ROM connected to the recording memory 4, which makes announcements indicating various lengths of time, for example, ``Playback will begin for XX minutes from now.'' The Percoll coefficient, which is a characteristic parameter of the time sound that is variably set corresponding to 〇〇 minutes, is the second
As shown in the figure, each address is assigned and stored. Reference numeral 9 denotes a voice synthesis circuit which is provided in parallel with the recording memory 4 and decodes and synthesizes voice signals based on the Percoll coefficient sequence.
The LSI product number VLM5030 manufactured by the company is used. Reference numeral 10 denotes a control circuit, which controls the addressing A ₁ , A ₂ , read/write R ₁ /W ₁ , and read R ₂ of both the memories 4 and 8, and also controls the A/D conversion circuit 3, D/A It controls the starts S ₁ , S ₂ , and S ₃ of the conversion circuit 5 and the speech synthesis circuit 9. Furthermore, 1
Reference numerals 1, 12, 13, 14, and 15 are operation switches connected to the control circuit 10 for performing recording, stop, playback, fast forward, and rewind operations, respectively.

Next, the operation will be explained.

(i) Recording mode When the recording switch 11 is closed, the control circuit 10
will send the start signal S ₁ to the A/D conversion circuit 3, the write instruction signal W ₁ and the address designation signal A ₁ to the recording memory 4, but at this time, the start address of the address designation signal A ₁ is the first address. As shown in FIG. 3A, in the blank address area after address N in the recording memory 4, the first a address is jumped to become the N+a address, which is sequentially counted at a sampling period of 8 KHz. Therefore,
At this time, the message voice input to microphone 1 passes through input filter amplifier 2 to A.
The signal is digitized by the D converter 3 and stored as a PCM signal with a sampling period of 8KHz in the recording memory 4 starting from address N+a. When the input of the message voice is completed, the stop switch 12 is closed, and the sending of the start signal _S1 and the address designation signal _A1 is stopped, and if the final address _A1 at this time is M-1. Then,
As shown in FIG. 3B, since the message area P of the message voice consists of M-N-a addresses, the time length of this message voice is (M-N-a).
It becomes 125μsec. Therefore, for example, M−N−a=10 ⁶
If the address is used, the control circuit 10 measures that the time length of this message is 2 minutes and 5 seconds, and writes "I'm home" from the bar call coefficient string in the announcement memory 8, as shown in FIG. "2",
"Minutes", "5", "Seconds", "Interval", "Plays".
The respective addresses “0”, “6”, “2”, “9”, “3”, “4”,
“1”
Addressing signal A ₂ and start signal that sequentially indicates
S ₂ to the announcement memory 8. At this time,
The control circuit 10 sends out an address designation signal A ₁ to the recording memory 4 at the same time as both signals A ₂ and S ₂ , and uses this address designation signal A ₁ to control the address area of the recording memory 4 from N to N+a-1. will be addressed as the announcement area Q, so the third
As shown in FIG. c, the Percoll coefficient string "It will be played for 2 minutes and 5 seconds from now" in the announcement memory 8 is stored as is in the announcement area Q of the recording memory 4. The transfer of the parcall coefficient between the memories 8 and 4 is executed at high speed by shortening the count-up period of the address instruction signal _A2 , and when this transfer is completed, the address instruction signal A to the recording memory 4 is transferred. ₁ and the transmission of the write instruction signal _W1 is stopped.

(ii) Regeneration mode When the regeneration switch 13 is closed, the control circuit 10
sends an addressing signal _A1 and a read signal _R1 to the recording memory, and this addressing signal _A1 is counted up. When this signal _A1 specifies the address N, a start signal _S3 is sent to the speech synthesis circuit 9 to cause the circuit 9 to operate. Depending on this, the address N of the recording memory 4 is
Announcement area Q from to address N+a-1
The Percoll coefficient string stored in The announcement will be played for 5 seconds.'' is output.

Next, when the address designation signal A ₁ specifies the address N+a, the start signal S ₃ is stopped and the start signal S ₂ is sent to the D/A conversion circuit 5 instead.
This circuit 5 is operated by sending out the signal. As a result, the PCM signal of the message voice stored in the message area P from address N+a to address M-1 of the recording memory 4 is introduced into the D/A conversion circuit 5, which converts it into analog format. The message is decoded into an audio signal and outputted from the speaker 7 via the output filter amplifier 6 as a message sound lasting 2 minutes and 5 seconds.

(iii) Fast forward and rewind mode, fast forward switch 1
4, the control circuit 10 counts up the addressing signal _A1 at high speed, and conversely, when the rewind switch 15 is closed, the control circuit 10 counts down the addressing signal _A1 at high speed. recording of desired message audio;
And the start address for playback is arbitrarily set.

In the above embodiment, the code string stored in the message area P of the recording memory 4 is a PCM signal, and the code string stored in the announcement area Q is a Percoll coefficient. ,
It is not limited to the above combinations. For example, if both are Percoll coefficients, instead of the A/D conversion circuit 3 described above, a voice analysis device that also has this A/D conversion function and performs Percoll analysis of voice, such as Sanyo Electric Co., Ltd. ) product number SRSP−
1 and use the speech synthesis circuit 9 in place of the D/A conversion circuit 5.

(f) Effects of the Invention As is clear from the above description, the voice recorder of the present invention records an announcement voice indicating the time length of the message in the address area immediately before the address area in which the code string of the message voice is stored in the recording memory. Therefore, before the message audio is played, an announcement indicating the time length of the message is played. Therefore,
The listener can know in advance the utterance time of the message voice he or she wants to hear from the announcement voice, and the usability of this type of voice recorder can be expected to be greatly improved.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the audio recorder of the present invention, FIGS. 2 and 3 a, b,
c is a memory diagram related to the voice recorder of the present invention, 4 is a recording memory, 8 is an announcement memory, 9 is a memory diagram related to the voice recorder of the present invention.
Reference numeral 10 indicates a speech synthesis circuit, and 10 indicates a control circuit.

Claims (1)

[Claims] 1. In recording mode, the audio signal input for each message is converted into a code string and stored in a recording memory, and in playback mode, the code string in the recording memory is decoded to reproduce and output the audio signal of the message. In addition to the above-mentioned recording memory, the voice recorder is equipped with an announcement memory in which code strings of audio signals of announcements indicating various time lengths are stored in advance, and measures the time length of the message inputted in the recording mode, and records the above-mentioned announcement by Addressing and storing the code string of the audio signal of the announcement indicating the time length of the message from the memory into the recording memory, and storing the code string of the audio signal of the message in the address area following the address area of the announcement. , by sequentially scanning the addresses of the recording memory in the playback mode, prior to reproducing and outputting the message audio signal according to the code string in the address area of the message, the message is read out according to the code string in the address area of the announcement. A voice recorder is characterized in that it reproduces and outputs an announcement indicating the length of time.