WO1998059341A1

WO1998059341A1 - Voice and character recorder

Info

Publication number: WO1998059341A1
Application number: PCT/KR1998/000178
Authority: WO
Inventors: Sang Chuel Jeong
Original assignee: An, Sang, Hyeon; Kim, Soo, Kang
Priority date: 1997-06-25
Filing date: 1998-06-25
Publication date: 1998-12-30
Also published as: KR19990003218A; AU7940298A; KR100267634B1

Abstract

A voice and character recorder which mixes and records both character information and voice information on the same channel of a magnetic tape and reproduces the information from the magnetic tape and separates the voice information from the character information, outputs the voice information from a loudspeaker, and displays the character information on an LCD, etc. It is also possible to reproduce the voice information only from the magnetic tape by an ordinary cassette player.

Description

Light

Title of invention

Voice and character recording device

The present invention provides a magnetic recording medium in which both a sound signal and a character signal are recorded on a magnetic thread tape.

It relates to a device for recording and reproducing.

The present invention provides, for example, a cassette tape player for learning a foreign language conversation which includes a speech signal containing pronunciation information such as a foreign language sentence or a word, and character data containing character information corresponding to the speech signal. The present invention relates to a caption tape reproducing device that reproduces the information together and outputs the information through a speaker and a display means such as an LCD.

In particular, the present invention is a device for recording and reproducing signals in stereo (or mono) of two channels, left (L) and right (R), and simultaneously mixes audio signals and text signals in each channel. The audio signal and the character signal thus recorded are reproduced to separate the character signal and the audio signal, and the separated signals are processed and output to the speaker and the LCD. And a character recording / reproducing apparatus.

Background art

As a conventional cassette player for learning a foreign language having a caption function, for example, there are publications of utility models in the Republic of Korea 933-754, 941-501, and patent publications 93-179. Applications have been filed as 4, 9 4—4 9 3 3 etc.

Such a technology is a device that reproduces audio information and character information recorded in different areas on the same recording medium, such as recording an audio signal on the L channel and recording a character signal on the R channel. Audio and text information Technology that plays back the audio and text signals recorded on each channel using the L / R channels from the amplifier and outputs them using speakers, and displays characters corresponding to the audio signals on an LCD or the like. It is.

That is, a conventional voice and character recording / reproducing apparatus has two channels for a function of reproducing a caption tape for learning a foreign language, for example, and records only a voice signal in one of the channels. This is a technique of reproducing and recording and reproducing only a character signal corresponding to an audio signal on another channel. Therefore, such a conventional technique must be provided with a dedicated cassette tape player for reproducing and processing voice and text in different areas. In other words, general force tape players and caption tapes are not interchangeable.

Therefore, even if it is desired to reproduce and listen to only the audio signal without a character display player, it cannot be listened to by a general cassette tape player, so a dedicated foreign language learning caption tape player must be provided. The problem occurs.

Disclosure of the invention

The present invention solves the above-mentioned problems, and provides an apparatus capable of recording and reproducing an audio signal and a character signal together on a magnetic tape as a magnetic recording medium with one channel. Aim.

The present invention provides, for example, a cassette tape player for learning a foreign language conversation, which includes a speech signal containing pronunciation information such as a foreign language sentence or a word, and character data containing character information corresponding to the speech signal. It is an object of the present invention to provide a caption tape reproducing device capable of recording and reproducing on one channel and separating and outputting the processed data by a display means such as a speaker and an LCD.

In particular, the present invention is a device for recording and reproducing a signal in stereo (or mono) of two channels, left (L) and right (R), and an audio signal and text on each channel as a device for reproducing. The character signal is mixed and recorded at the same time, the voice signal and the character signal thus recorded are reproduced to separate the character signal and the sound-voice signal, and the separated signals are processed to produce a speaker and an LCD. It is an object of the present invention to provide a voice and character recording / reproducing device that can output the audio and text.

BEST MODE FOR CARRYING OUT THE INVENTION

In the voice and character recording and reproducing apparatus of the present invention, FIGS. 1 to 3 show recording (or reproduction) of voice and character data recorded on a magnetic recording medium (magnetic tape) by the voice and character recording and reproducing apparatus of the present invention. Shows the format.

Figure 1 shows a case where character data is recorded in a frequency band higher than the audible frequency band.Character data 101 is recorded in a 22KHz band higher than the audible frequency band (20Hz to 20KHz), and an audio signal is recorded in the audible frequency band. It is shown that. The audio signal and the character signal recorded in this way are separately recorded only in the frequency band on the same channel, and during reproduction, high-band filtering is performed to separate the audio signal and the character data and process them. become.

Fig. 2 shows a case where character data is recorded in the audio frequency band. Character data 201 is recorded in a predetermined frequency band in the audio frequency band (20 Hz to 20 KHz), and an audio signal is recorded in the audio frequency band. It is shown that. The voice signal and the character signal recorded in this way are recorded on the same channel. At the time of reproduction, the audio signal and the character data are separated and processed by performing band-pass filtering. Fig. 3 shows a case where character data is recorded in a frequency band lower than the audible frequency band.Character data 301 is recorded in a band lower than the audible frequency band (20Hz to 20KHz) and lower than 20KHz, and audio signals are recorded in the audible frequency band. Indicates that it is to be recorded. Only the frequency band of the audio signal and the text signal recorded in this way are separately recorded on the same channel. At the time of reproduction, the audio signal and the text data are separated by performing low-band filtering, and each is processed. FIG. 4 is a block diagram of a voice and character recording / reproducing apparatus according to the present invention, where 400a is a recording system, and 400b is a reproducing system.

The recording system 400a includes a personal computer 401 on which a program for caption editing control is driven, and a caption for editing an audio signal and a character signal by driving the caption editing program of the personal computer 401. It includes a master editing board 402, a recording signal interface 403 for inputting an audio signal to be recorded, and a recorder 404 for recording caption-edited audio and character signals on a tape as a magnetic recording medium.

In the tape production process using the recording system 400a thus configured, a program for inserting caption subtitles is driven by using the personal computer 401, and the caption master editing board is driven by driving this program. 402 will perform the signal modulation. The caption subtitle data is edited into the audio signal to be recorded from the recording signal interface 403 in a predetermined format, and the recorder 404 records the audio signal and the character signal together on the same channel to produce a caption tape. The characters and audio signals thus recorded are reproduced by the reproduction system 400b.

The reproducing system 400b includes a signal input section 405 of a read channel or an R channel read from a signal reproducing element such as a magnetic head at a preceding stage, a preamplifier 406 of the input signal, and the preamplifier. A power amplifying device 407 for amplifying the signal of the device 406; a speaker 408 for outputting the power-amplified audio signal; and a demodulation for extracting a character signal from the signal input through the signal input unit. A processing unit 409; a digital signal processing unit 410 for processing the demodulated character signal with font data; and performing data processing for a CD display; and character information processed by the digital signal processing unit 410. And an LCD module processing unit 411 for displaying on the LCD.

In the signal input section 405 of the playback system 400b, audio is played on the same channel (L or R). And a reproduced signal in which the character signal is mixed.

Preamplifier 406 performs signal processing such as filtering and amplification for extracting an audio signal from the input signal, and outputs the audio signal amplified by power amplifier 407 through speaker 408.

The demodulation processing unit 409 performs filtering, equalization amplification, and demodulation for extracting a character signal from the input signal, and the digital signal processing unit 410 decodes the demodulated character data and converts the decoded character data into font data. Process and display on LCD by LCD module processing unit 411.

That is, with reference to the font memory 410a, the one-chip microprocessor 410b converts the decoded character data into font data, and loads the converted character data on the LCD map memory 410c. In other words, characters are displayed on the LCD-liquid crystal display 411b by referring to the contents.

FIG. 5 shows a voice and character recording apparatus for recording character data in a band higher than the audible frequency as shown in FIG. 1 as Embodiment 1 of the recording system 400a.

The voice and character recording device includes a recording signal input section 501, an input recording signal amplifying device 502 and a filter 503, and a mixer 504 for mixing the output voice signal of the filter 503 and the output character signal of the matching device 511. A recorder 505 for recording the mixed audio and text signals together on a channel on a magnetic tape, a data encoder 508 for encoding subtitle data by a program 507 driven for caption editing, A modulator 509 for modulating the encoded subtitle data, a high-bandpass filter 510 for securing a high-band component of the modulated subtitle data, and a sub-band data subjected to high-band filtering to the mixer 504 And a matching device 511 for the

The audio signal to be recorded input to the signal input section 501 is amplified through an amplifier 502, removed from a high-band frequency of 20 KHz or more while passing through a filter 503, and input to a mixer 504. This is for character data that is processed into subtitles in the high frequency band. This is a high band removal function for mounting.

Then, the caption generating program 507 is driven to encode the caption subtitle data through the encoder 508, which is phase-modulated at the return frequency by 2 bits at a time through the modulator 509 to obtain a high-bandpass filter. Pass 510.

Since the high-bandpass filter 510 passes only the band of 20 KHz or more, the voice and character data are separated and recorded in different bands as shown in FIG. The high-band-filtered character data is input to the mixer 504 through the matching device 511.

The mixer 504 mixes the audio signal passed through the filter 503 and the character signal passed through the matching device 511 and sends the mixed signal to the recorder 505.The recorder 505 converts the mixed signal of the voice and the character signal into the same channel. Caption tape generation 506 is performed by dividing the band on the tape and recording.

FIG. 6 shows an apparatus for reproducing the caption tape recorded according to FIGS.

The audio and character reproducing apparatus includes a reproducing signal input section 601, a preamplifier 602 and a power amplifier 603 for amplifying an input reproducing signal, a speaker 604 for outputting an amplified audio signal, A high-bandpass filter 605 for extracting a character signal from the signal, an automatic gain control circuit 606 and an equalizer 607 for compensating the high-bandpassed character signal, and converting the equalized character signal. It includes a demodulator 608 for demodulation, a data decoder 609 for decoding the demodulated character signal and displaying it on a CD, and an LCD map memory 610.

The signal of the channel or the R channel input to the signal input unit 601 is a signal in which the voice and the character read by the magnetic head are divided into bands and mixed.

The signal input to the signal input unit 601 is amplified by the preamplifier 602, amplified by the power amplifier 603, and outputted to the speaker 604 as an audio signal in an audible frequency band. After the signal input to the signal input unit 601 is passed through the band-pass filter 605, the audio signal band is removed, only the high-band character data signal component is passed, and the gain is automatically controlled by the AGC circuit 606. The equalizer 607 performs equalization processing.

This is present at the time of reproduction, and there is a gain reduction and delay phenomenon due to the C component. Therefore, it is necessary to perform an automatic gain control process with an equalizer to compensate for this phenomenon.

The character signal subjected to the equalization processing is demodulated while passing through a demodulator 608, and is decoded into a font data format by a data decoder 609, and is loaded on an LCD map memory 610. Characters are displayed by the digital signal processing unit 410 and the LCD module processing unit 411 in the reproduction system 400b.

FIG. 7 shows a voice and character recording device for recording character data within an audible frequency band as shown in FIG. 2 as Embodiment 2 of the recording system 400a.

The voice and character recording device includes a recording signal input unit 771, an input recording signal amplifier 502 and a bandpass filter 703, and a mixing device for mixing the output voice signal of the filter 703 and the output character signal of the matching device 711. 704, a recorder 705 for recording mixed voice and text signals together on a channel on magnetic tape, and a data encoder 708 for encoding subtitle data by a program 707 driven for editing captions. A modulator 709 for modulating the encoded subtitle data, a band-pass filter 710 for securing the band component of the modulated subtitle data, and a band-filtering subtitle data for supplying to the mixer 704. And the matching device 711.

The audio signal to be recorded input to the signal input unit 701 is amplified through the amplifier 702, removed from the specific frequency while passing through the bandpass filter 703, and input to the mixer 704. This is a band elimination function for placing character data to be processed as subtitles in the audio frequency band. Also, caption subtitle data is encoded by the encoder 708 by driving the caption generation program 707. This is phase-modulated to the return frequency by 2 bits while passing through the modulator 709, and the band pass filter 710 is transmitted. pass.

The band-pass filter 10 allows voice and character data to be separated and recorded in the audible frequency band as shown in FIG. 2 by passing only a specific band.

The filtered character data is input to the mixer 704 through the matching device 711.

The mixer 704 mixes the sound signal passed through the filter 703 and the character signal passed through the matching device 711, and sends the mixed signal to the recorder 705.The recorder 705 outputs the mixed signal of the sound and the character signal. Caption tape generation 706 is performed by dividing and recording the band on the tape of the same channel.

FIG. 8 shows an apparatus for reproducing the caption tape recorded according to FIG. 2 and FIG.

The audio and character reproducing apparatus includes an input section 801 for a reproduced signal, a band-pass filter 802 for separating an audio signal of the input reproduced signal, and a pre-amplifier for amplifying the band-pass filtered signal. Amplifying device 803 and power amplifying device 804, speaker 805 for outputting an amplified audio signal, band-pass filter 806 for extracting a character signal from a reproduced signal, and compensation for a band-passed character signal. Gain control circuit 807 and equalizer 808 for demodulation, demodulator 809 for demodulating the equalized character signal, and data for decoding and demodulating the demodulated character signal on LCD Includes a decoder 810 and an LCD map memory 811.

The signal of the channel or the R channel input to the signal input unit 801 is a signal in which voice and characters read by a magnetic head are mixed.

The signal input to the signal input unit 801 has its character signal band removed by the band-pass filter 802, passes only the audio signal component, is amplified by the preamplifier 803, and is amplified by the power amplifier 804. An audio signal in the audio frequency band is output from the speaker 805. The signal input to the signal input unit 801 passes through the band-pass filter 805, removes the band of the audio signal, passes only the character data signal component of a specific band, and is automatically gain-controlled by the AGC circuit 807. After that, it is equalized by the equalizer 808.

This is to perform equalization and automatic gain control processing to compensate for the gain reduction and delay phenomena due to the R, C, and C components present during playback.

The equalized character signal is demodulated while passing through a demodulator 809, and is decoded by a data decoder 810 in a font data format, while being loaded on an LCD map memory 811 and reproduced in FIG. In the system 400b, characters are displayed by the digital signal processing unit 410 and the LCD module processing unit 411.

FIG. 9 shows a voice and character recording device for recording character data in a band lower than the audible frequency band as shown in FIG. 3 as Embodiment 3 of the recording system 400a.

This voice and character recording device includes a recording signal input unit 901, an input recording signal amplifier 902 and a high-bandpass filter 903, and mixes the output voice signal of the filter 903 with the output character signal of the matching device 911. Mixer 904, a recorder 905 for recording mixed voice and text signals together on a channel on magnetic tape, and a data encoder 908 for encoding subtitle data by a program driven for caption editing. A modulator 909 that modulates the encoded subtitle data, a low-bandpass filter 910 that secures a low-band component of the modulated subtitle data, and a low-band filtered subtitle data to the mixer 904 And a matching device 911 for performing

The audio signal to be recorded input to the signal input unit 901 is amplified through the amplifier 902, passes through the filter 903, passes through a high frequency band of 20 Hz or more, and is input to the mixer 904.

This is a high-bandpass function for placing character data to be processed with subtitles in a low-band frequency band. Then, the caption generation program 907 is driven. Then, the caption subtitle data is encoded by the encoder 908, which is phase-modulated at the return frequency by 2 bits via the modulator 909 and passes through the low-pass filter 910.

The low bandpass filter 910 allows only voice and character data to be separated and recorded in different bands as shown in FIG. 3 by passing only a low band below 20 Hz.

The low-band filtered character data is input to the mixer 904 through the matching device 911.

The mixer 904 mixes the voice signal and the character signal passed through the matching device 911 through the filter 903 and sends the mixed signal to the recorder 905.The recorder 905 converts the mixed signal of the voice and the character signal into the same channel. Caption tape generation 906 is performed by dividing the band and recording it on the tape.

The apparatus for reproducing the voice and character signals recorded in this way is such that the band-pass filter 802 is replaced with a high-band-pass filter and the band-pass filter 806 is replaced with a low-band-pass filter in the reproducing apparatus of FIG. This operation is the reverse of the recording of FIG. 9 and is very similar to the embodiment of FIG.

However, since the character data is recorded in a band lower than the audible frequency band in which the audio signal is recorded, only a filtering process for separating the character data on the low band side and the audio signal on the high band side is different.

The character data format of the present invention processed as described above has a 3-byte data format.

The first byte is the position information, the upper 3 bits are the X coordinate of the LCD, the lower 5 bits are the Y coordinate information of the LCD, the second byte is the upper 4 bits of the language selection information, and the lower area is the unused area. The 4 bits are information indicating the language (2 ⁴ = 16 countries) for which language the character data means.

The third byte is the character information to be displayed. This format is an example, and is not limited to this, and it is sufficient to have the appropriate number of bytes and bits required to optimally represent the language of the country in which it will be expressed.

Industrial applicability

In the voice and character recording / reproducing apparatus according to the present invention, the voice signal and the character signal are both recorded on the same channel, and the character signal is modulated at the time of recording. Compatibility is ensured so that only audio signals can be reproduced with good sound quality without interference.

In particular, conventional caption players record and reproduce audio signals on one channel and caption data on the other channel.

However, if the content is listened to by a player, bit noise is heard due to the reproduction of the character channel, but the present invention can solve such a problem.

Conventionally, to produce a single tape, a tape on which audio signals and character data were recorded was produced, and then a caption tape was finally produced. Although there is a problem, according to the present invention, a final master tape can be produced by caption processing using a general personal computer without producing a data tape.

BRIEF DESCRIPTION OF THE FIGURES

【Figure 1】

FIG. 3 is a diagram showing a recording / reproducing band when character data is recorded in a band higher than an audible frequency as Embodiment 1 of the present invention.

【Figure 2】

Second Embodiment of the Present Invention When Recording Character Data in the Audible Frequency Band The figure which shows a recording / playback band.

[Figure 3]

FIG. 13 is a diagram showing a recording / reproducing band when character data is recorded in a band lower than an audible frequency as Embodiment 3 of the present invention.

[Fig. 4]

FIG. 1 is a block diagram of a voice and character recording and reproducing apparatus according to the present invention.

[Figure 5]

FIG. 1 is a block diagram of a voice and character recording device according to a first embodiment of the present invention.

[Fig. 6]

FIG. 1 is a block diagram of a voice and character reproducing device according to a first embodiment of the present invention.

[Fig. 7]

FIG. 4 is a block diagram of a voice and character recording device according to a second embodiment of the present invention.

[Fig. 8]

FIG. 5 is a block diagram of a voice and character reproducing device according to a second embodiment of the present invention.

[Fig. 9]

Claims

(I) Claims

[Claim 1]

A cassette tape player with a caption function that records audio signals and character signals on a magnetic tape as a magnetic recording medium, reproduces them, and outputs character information along with audio.

Means for filtering in a first band to record an audio signal on a predetermined channel on a magnetic tape; and filtering in a second band for recording the character signal together on the audio recording channel on a magnetic tape. A voice and character recording device, comprising: means for modulating; and means for mixing the filtered audio signal with the filtered and modulated character signal and recording the mixed signal on a predetermined channel on a magnetic tape.

[Claim 2]

A cassette tape player with a caption function that records voice signals and character signals on a magnetic tape as a magnetic recording medium, reproduces the signals, and outputs character information along with voice.

Reproducing means for reproducing an audio signal and a character signal recorded together on a predetermined channel on a magnetic tape in a state of being divided into bands based on an audible frequency band;

Separating means for separating an audio signal and a character signal in the signal reproduced by the reproducing means by utilizing different band recording characteristics;

Audio output means for outputting the audio signal separated by the separation means with a speaker,

Display means for demodulating and displaying the character signal separated by the separation means.

[Claim 3]

The character signal has a frequency band higher than an audible frequency band in which an audio signal is recorded. 3. The sound and character reproducing device according to claim 2, wherein the sound and the character are modulated and recorded on a region. -

[Claim 4]

3. The sound and character reproducing apparatus according to claim 2, wherein the character signal is recorded after being modulated in a predetermined frequency band within an audible frequency band in which an audio signal is recorded.

[Claim 5]

3. The sound and character reproducing apparatus according to claim 2, wherein the character signal is recorded after being modulated on a frequency band lower than an audible frequency band in which an audio signal is recorded.