JP2823673B2 - Video disc player - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to a video disc player, and more particularly, to an accompaniment of a voice output from a microphone, such as a user's singing voice, and a song reproduced from a video disc (hereinafter, referred to as “accompaniment”). The present invention relates to a video disk player having a function of synthesizing voices such as song accompaniment.

[Conventional technology]

Video disc players are described in, for example, “Introduction to Video Discs and DADs”, edited by Corona, Iwamura, pp. 124-131,14.
As described on page 0 to page 142, a code signal corresponding to a screen such as a frame number and a program time is recorded on a video disk (the recording format of a current code signal is more in a CLV disk). Seconds and frame numbers in seconds are recorded.) Then, high-speed random access is possible using the code signal recorded on the video disk. In recent years, video disc players have been increasingly used for karaoke applications and the like, making use of the advantages of a high-speed random access function and high image quality and high sound quality. In other words, it is possible to quickly search for songs recorded on a video disc and to provide lyrics information on a screen. Utilizing these features, the video disc player is equipped with a microphone input, echo or reverb circuit, key control circuit, and mixing circuit, so that users can easily enjoy high-quality karaoke.

In addition, as a device related to this type of device, there is, for example, a device described in the Dempa Shimbun, page 18, June 20, 1989.

[Problems to be solved by the invention]

Although the above prior arts have taken considerable care to make it easy for users to enjoy high quality karaoke, when practicing karaoke, they evaluate their singing voice,
There were no considerations for scrutiny, and there were difficulties when users tried to improve their karaoke skills. In other words, if the user tries to practice karaoke, the function of singing the song along with the song accompaniment is the main feature, so the song will not be sung. It was impossible to evaluate and examine.

Therefore, in order to evaluate and examine my singing voice, I recorded my singing voice along with the singing accompaniment while singing, using a tape recorder, etc. separately from the video disc player. It is conceivable to listen to the singing voice, but in this case, the balance between the volume of the singing voice and the singing accompaniment is determined by the condition at the time of recording, so it is not possible to change the balance during playback. Was. In addition, there is also inconvenience such that cueing cannot be easily performed during reproduction.

The above problem is a problem in a video disc player for karaoke.For example, in a video disc player for language practice such as English conversation practice, the configuration and operation are almost the same as the video disc player for karaoke. Similar problems are possible.

An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a voice such as a singing voice or pronunciation of a user, which is generated in accordance with a voice such as a singing accompaniment or a teacher's pronunciation played from a video disc. Another object of the present invention is to provide a video disk player capable of outputting in synchronization with a voice such as a song accompaniment or a teacher's pronunciation reproduced from a video disk.

[Means for solving the problem]

In order to achieve the above object, according to the present invention, a semiconductor memory is provided, and write / read control means for performing write / read control and address control of the semiconductor memory is provided.

[Action]

The write / read control means writes (synchronously) an audio signal output from a microphone to the semiconductor memory in synchronization with an audio signal reproduced from a video disk, and writes the written audio signal to the semiconductor memory. Thus, the data can be read out (in synchronization) with the audio signal reproduced from the video disk.

That is, the write / read control means inputs a code signal indicating a reproduction position of the video disk, and at the time of writing, associates an address at which an audio signal output from the microphone is stored with the input code signal. At the time of reading, an address corresponding to the input code signal is searched, and a voice signal stored at the address in the semiconductor memory is read. .

Therefore, the user writes his / her own singing voice or pronunciation, etc., in accordance with the voices of the song accompaniment or the teacher's pronunciation played from the video disk, into the semiconductor memory,
It can be memorized, and later memorized voices such as my own singing voice and pronunciation can be read out and output according to voices such as song accompaniment and teacher's pronunciation also played from the video disk, so karaoke You can listen to your own singing voice and pronunciation when practicing vocabulary and language practice, and try to find and correct weaknesses.

Embodiment One embodiment of the present invention will be described below with reference to FIG.
FIG. 1 is a block diagram showing one embodiment of the present invention.

In FIG. 1, a video disk (not shown) is rotated by a disk motor (not shown),
Reads the recorded information on the video disk surface and outputs it as an electric signal. The output of the pickup 2 is sent to a video demodulation circuit 3 and an audio demodulation circuit 4, where the video signal and the audio signal are respectively demodulated.

The code separator 5 receives the video signal output from the video demodulation circuit 3 as input, and uses this video signal to determine the playback position of the video disk such as the frame number, chapter number, and time number recorded on the video disk surface. Separate and output the code signal to know. The microcomputer 6 inputs the code signal, and based on the code signal,
A command to move the position of the pickup 2 in the radial direction of the video disk is issued, and the pickup moving means (not shown) moves the pickup 2 to control the information reproduction position. The sync separator 7 receives a video signal output from the video demodulation circuit 3 as an input, and separates and outputs various sync signals (horizontal sync signal, vertical sync signal, frame signal, etc.) from the video signal.

On the other hand, in the karaoke function, the amplifier circuit 9 amplifies an audio signal input via the microphone 8, and the echo circuit 10 usually performs an echo process or a reverb process on the output of the amplifier circuit 9. The output of the echo circuit 10 is input to the mixing circuit 12 via the variable gain amplifier 11. The output of the audio demodulation circuit 4 is also supplied to the mixing circuit 12.
Is input to

The mixing circuit 12 adds the output of the variable gain amplifier 11 and the output of the audio demodulation circuit 4 at an appropriate addition ratio and outputs the result. Although only one mixing circuit 12 is shown here, it goes without saying that if the number of audio channels recorded on the video disk is plural, mixing circuits having the same function are required by the number of channels. In this case, a channel selection circuit controlled by the microcomputer 6 or the like is inserted between the audio demodulation circuit 4 and the mixing circuit 12.

The parts described so far are functions provided in a normal karaoke video disc player. still,
In some cases, a key controller capable of changing the pitch of an audio signal may be inserted between the audio demodulation circuit 4 and the mixing circuit 12.

 Next, the main configuration and operation of the present invention will be described.

The clock generation circuit 20 generates a clock signal synchronized with the synchronization signal output from the synchronization separation circuit 7 and having a frequency suitable for sampling the audio signal. The A / D converter 21 samples an analog audio signal output from the amplifier circuit 9 based on the frequency of the clock signal output from the clock generation circuit 20, quantizes and encodes the analog amount, and outputs a digital signal. Output as audio signal. The digital audio signal output from the A / D converter 21 is sent to the data input / output unit of the semiconductor memory 22 via the switch circuit 30.

Read / write control of the semiconductor memory 22 is performed by the microcomputer 6, and address control is performed by the address control circuit 25. At the time of writing, an audio signal output from the A / D converter 21 input from the data input / output unit is written, and at the time of reading, the written audio signal is output to the data input / output unit.

The D / A converter 23 inputs a signal output to the data input / output unit of the semiconductor memory 22 via the switch circuit 30, converts a digital signal into an analog signal, and outputs the signal. This output is input to one input of a switch circuit 24 provided between the amplifier circuit 9 and the echo circuit 10. Switch circuit 24
The other input is the output of the amplifier circuit 9, the selection of two inputs is made by a switch switching signal output from the microcomputer 6, and the output of the switch circuit 24 is input to the echo circuit 10.

Then, microcomputer 6, address control circuit 25,
The operation of the semiconductor memory 22 and the like will be described in more detail below.

First, an operation of writing an audio signal input via the microphone 8 into the semiconductor memory 22 will be described. It is assumed that no audio signal is written in the semiconductor memory 22 at this time.

When writing to the semiconductor memory 22 is started, the microcomputer 6 refers to a table memory (not shown) inside the microcomputer 6 to search for a head address of an unwritten area of the semiconductor memory 22, and determines the head address. The data is output to the address control circuit 25 as the write start address and stored in the table memory. Then, a code signal output from the code separator 5 and indicating the reproduction position of the video disk is read, and the value of the code signal is also stored in the table memory.

On the other hand, the address control circuit 25 including a counter loads the write start address (head address) output from the microcomputer 6 as an initial value, and refers to the frame signal from the synchronization separation circuit 7 to cut the next screen frame. At the time of switching, it is set to the enable state, starts counting, and counts up according to the clock signal from the clock generation circuit 20.

Similarly, the microcomputer 6 also refers to the frame signal from the synchronization separation circuit 7 to control the address control circuit 25.
Starts counting (that is, the next time the screen frame is switched), simultaneously outputs a write signal to the semiconductor memory 22 so as to enter the write mode, and switches the A / D converter 21 to the A / D converter 21. Of the semiconductor memory 22 is input to the data input / output unit.

Thus, the up-count output of the address control circuit 25 is input to the address bus of the semiconductor memory 22, and the output of the A / D converter 21 is sequentially stored at a new address on the semiconductor memory 22.

Thereafter, when the writing to the semiconductor memory 22 is completed, the microcomputer 6 reads the code signal from the code separator 5 and stores the value of the code signal at that time in the table memory. Then, the next time the screen frame is switched with reference to the frame signal from the sync separation circuit 7, the address output from the address control circuit 25 is read, and this address is stored in the table memory together with the write end address. Along with semiconductor memory
A write end signal is output to 22.

Instead of reading the address output from the address control circuit 25, the address is replaced with the code signal value at the start of writing, the code signal value at the end of writing, and the frequency of the clock signal output from the clock generation circuit 20. And may be calculated from

When writing to the semiconductor memory 22 is started again, the microcomputer 6 refers to the table memory to search for the last write end address in the semiconductor memory 22, and starts writing the next address after the write end address. The address is output to the address control circuit 25 and stored in the table memory. And
The code signal indicating the reproduction position of the video disk output from the code separator 5 is read, and the value of the code signal is also stored in the table memory.

On the other hand, the address control circuit 25 loads the write start address output from the microcomputer 6 as an initial value.

 Hereinafter, the same operation as described above is repeated.

Thus, the semiconductor memory 2 stores the audio signal input via the microphone 8, and the table memory inside the microcomputer 6 stores the write start address and the value of the code signal corresponding thereto (that is, A code signal value indicating the playback position of the video disc at the start of writing), a write end address and a value of a code signal corresponding thereto (that is, a code signal value indicating the playback position of the video disk at the end of writing), Are stored as a set.

Next, an operation of reading the audio signal stored in the semiconductor memory 22 will be described.

When reading from the semiconductor memory 22 is started, the microcomputer 6 outputs a read signal to the semiconductor memory 22 so as to be in the read mode, and switches the switch circuit 30 to output from the data input / output unit of the semiconductor memory 22. The input is switched to the input of the D / A converter 23.

Thereafter, the microcomputer 6 checks whether or not the reproduction mode is the normal reproduction mode (play). If the reproduction mode is the normal reproduction mode, the microcomputer 6 reads the code signal output from the code separator 5 and refers to the table memory. The value of the code signal (that is, the value of the code signal indicating the current playback position of the video disk; hereinafter, the value of the current code signal) is the value of the code signal corresponding to the write start address (that is, the value at the time of starting the write). A value between the value of the code signal indicating the playback position of the video disc) and the value of the code signal corresponding to the write end address (that is, the value of the code signal indicating the playback position of the video disc at the end of writing). Check if there is.

If the value of the current code signal is a value between the above values, the microcomputer 6 calculates and outputs a read start address corresponding to the value of the current code signal as follows. That is, the difference between the value of the current code signal and the value of the code signal corresponding to the above-described write start address is obtained, and for a disc in which the code signal changes every 1/30 seconds, for example, the previous difference is divided by 30. After, the clock generation circuit
Multiplying the frequency of the clock signal from 20 and adding the above-mentioned write start address to the obtained value, obtain a read start address corresponding to the value of the current code signal, and output it to the address control circuit 25.

The address control circuit 25 loads the read start address output from the microcomputer 6 as an initial value, refers to the frame signal from the synchronization separation circuit 7, sets the enable state when the next screen frame is switched, and counts. Is started, and the count is incremented according to the clock signal from the clock generation circuit 20.

Similarly, the microcomputer 6 also refers to the frame signal from the synchronization separation circuit 7 to control the address control circuit 25.
Starts counting (that is, the next time the screen frame is switched), at the same time, switches the switch circuit 24 so that the output of the D / A converter 23 is input to the input of the echo circuit 10.

As a result, the stored audio signals are sequentially read from the semiconductor memory 22 from the address corresponding to the value of the code signal obtained from the video disk. Then, the read audio signal is converted from a digital signal to an analog signal by the D / A converter 23, and then the switch circuit 2
4. The signal is input to the mixing circuit 12 via the echo circuit 10 and the variable amplifier 11, where it is synthesized with the audio signal reproduced from the video disk and output.

When terminating the reading from the semiconductor memory 22, the microcomputer 6 reads the code signal output from the code separator 5, and refers to the table memory to determine the value of this code signal (ie, the value of the current code signal). Is equal to the value of the code signal corresponding to the write end address (ie, the value of the code signal indicating the reproduction position of the video disk at the end of the write).

If the value of the current code signal is equal to the above value, the microcomputer 6 refers to the frame signal from the sync separation circuit 7 and switches the switch circuit 24 to the amplifier circuit 9 when the screen frame is switched next time. Of the echo circuit 10 is input to the input of the echo circuit 10.

FIGS. 2 and 3 show simple flowcharts of the control operation of the microcomputer 6 at the time of writing to the semiconductor memory 22 and reading from the semiconductor memory 22 described above.

According to the present embodiment, the user can write his / her own singing voice, which is emitted along with the song accompaniment played back from the video disk, in the semiconductor memory 22 and store it therein, and thereafter, the user can store his / her own singing voice. The singing voice can be read out and output in synchronization with the singing accompaniment that is also played from the video disk, so when practicing karaoke,
Evaluate your singing voice, such as whether the rhythm and pitch match,
Can be examined.

The volume balance between the song accompaniment reproduced from the video disk and the singing voice read from the semiconductor memory 22 is determined by the function normally provided by the video disk player.
Since it can be adjusted freely, the user can evaluate and examine his / her singing voice with the volume balance as desired by the user.

In addition, by using the abundant search functions such as the cue function and the fast forward function while watching the screen on the video disc player, you can search for the song accompaniment played from the video disc, and match your stored singing voice to it. , The user can easily reproduce the song accompaniment of the part desired by the user and read out his / her own singing voice. Therefore, the usability is extremely improved, and the user can easily evaluate his / her own singing ability and practice repeatedly.

In the above embodiment, the video disc player for karaoke is described as an example. However, the video disc player for language practice such as English conversation practice can also be used as the first disc player.
Since the configuration and operation are almost the same as those in the drawing, the same effect can be expected.

〔The invention's effect〕

As described above, according to the present invention, a voice such as a singing voice or pronunciation of a user, which is emitted in accordance with a voice such as a song accompaniment or a teacher's pronunciation played from a video disc, is written into a semiconductor memory. Can be memorized and later
The stored voices such as the singing voice and pronunciation of the user can be read out and output according to the voices of the song accompaniment and the pronunciation of the teacher, which are also played from the video disk, so that you can practice karaoke and language practice. You can fully evaluate and examine your singing voice and pronunciation.

In addition, the volume balance between the voice, such as the song accompaniment played by the video disk or the pronunciation of the teacher, and the volume read, such as the singing voice of the user, generated from the semiconductor memory, can be freely adjusted by the functions normally provided in the video disk player. The user can evaluate and examine his or her singing voice and pronunciation at the volume balance desired by the user.

In addition, by using a search function such as a cue function or a fast-forward function while watching a screen in a video disc player, a voice such as a song accompaniment or a teacher's pronunciation reproduced from the video disc is stored. Voices such as singing voices and pronunciations of the user are also searched according to them, so it is easy to play the song accompaniment and teacher's pronunciation etc. of the user's desired part and read out their singing voice and pronunciation etc. , Very easy to use.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention, FIG. 2 is a flowchart showing a control operation of a microcomputer at the time of writing to the semiconductor memory of FIG. 1, and FIG. 5 is a flowchart showing a control operation of the microcomputer at the time of reading of FIG. Description of the code 5: code separator, 6: microcomputer, 7
... Sync separation circuit, 8 Microphone, 12 Mixing circuit, 21 A / D converter, 22 Semiconductor memory, 2
3 ... D / A converter, 25 ... Address control circuit.

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Akio Nakajima 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Inside Hitachi Video Engineering Co., Ltd. (72) Junichi Ikoma 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Hitachi, Ltd. (56) References JP-A-3-296972 (JP, A) JP-A-63-30900 (JP, A) JP-A-63-13485 (JP, U) (58) Fields investigated (Int) .Cl. ⁶ , DB name) G10K 15/04

Claims (1)

(57) [Claims] An input unit, A / D conversion means (21), D / A conversion means (23), first switching means (30), second switching means (24), code separation means (5), mixing A video disk player comprising means (12), control means, semiconductor memory (22), and a correspondence table, for reproducing an audio signal and a video signal in which a code signal is applied to each frame from the video disk; The means (21) converts the audio signal input from the input unit into a digital signal and outputs the digital signal to the first switching means (30). The D / A conversion means (23) outputs the digital signal from the first switching means (30). The input signal is converted into an analog signal, and the second switching means (24)
The first switching means (30) connects the A / D conversion means (21) or the D / A conversion means (23) to the semiconductor memory (22), and the second switching means (24) , An input unit or a D / A conversion means (23) is connected to the mixing means (12), and a code separation means (5) separates and outputs a code signal from a video signal of a video disc, 12) combines and outputs the output signal of the second switching means (24) and the audio signal of the video disk, and the control means inputs the write signal, the read signal and the code signal from the code separation means (5). Then, when a write signal is input, the first switching means (30) is connected to the A / D conversion means (21) and the second switching means (24) is connected to the input section, and the semiconductor memory (22) is written. Performs control and stores the code signal and the write address to be output in the correspondence table. When the read signal is input, the first switching means (30) is connected to the D / A conversion means (23), and the second switching means (24) is connected to the D / A conversion means (23). A video disc player which outputs an address corresponding to a code signal as a read address based on a table and controls reading of a semiconductor memory (22).