JP2001092471A - Communication system and communication method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To excellently display a music name, etc., in a communication system applied to a karaoke reproducing equipment, etc. SOLUTION: This system is provided with a reproduction means reproducing the audio and video data stored in a storage medium, a reception means receiving the video data from the outside, an output means outputting the video data and a control means controlling so that the output means outputs the received video data when the reception means ends to reproduce the user required audio and video data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication system and a communication method suitable for a karaoke reproducing apparatus using a digital data recording disk called a CD (compact disk).

[0002]

2. Description of the Related Art Conventionally, a karaoke reproducing apparatus using a small digital data recording disk having a diameter of about 12 cm called a CD (compact disk) (that is, reproducing the accompaniment sound of a tune and mixing sound input from a microphone). Devices that play back music) have been developed. In this case, what is generally called a CD is such that only a maximum of about 74 minutes of audio data is recorded as main digital data on a single disc, but a karaoke reproducing apparatus reproduces images such as lyrics. It is more convenient to display along with the audio. For this reason, CDs used for karaoke
In the case of, there is a type in which video data of a still image for displaying lyrics and the like is recorded in an additional recording area called a subcode.

On the other hand, since a moving image can display a more complicated image than a still image, a video recording disk using a relatively large disk (for example, about 30 cm in diameter) called a video disk is used. Various karaoke playback devices have been put to practical use. However, since the diameter of the video disc is large, the storage space for the video disc is large, and there is an inconvenience that the video disc can only be used when there is enough space for installing the karaoke equipment.

[0004] To solve these inconveniences, the ISO
A coding method called MPEG1 standardized by the (International Organization for Standardization) has been developed so that long-time audio data and moving image video data can be recorded on a small disk. In recording by this method, digital audio data is compressed to a fraction (for example, 1/5) and recorded by performing subband division, bit allocation for each divided band, and time division with this audio data. , Which records digital moving image data that has been compressed to a high efficiency of several tens to several hundreds using DCT or the like.
By applying the present invention to a (digital data recording disc called a CD-ROM), about 74 minutes of digital audio data and moving picture digital video data can be recorded on one disc.

[0005]

A CD to which a recording system called the MPEG1 system is applied.
In the case of, data such as a song title can be recorded by the additional information. For this reason, in the case of a karaoke reproducing device to which this system is applied, the title of the music can be displayed on a connected monitor receiver or a display of the device body.

[0006] However, in the case of the conventional karaoke reproducing apparatus, good song title display has not been performed. That is, for example, it is conceivable to operate the song title display switch provided on the playback device to switch the image on the screen of the monitor receiver from the display of the moving image played back from the disc to the display of the song title. The operation is troublesome, and the display of the moving image being reproduced from the disc is interrupted during the display of the song title. For this reason, it is conceivable to display the song title in superimposition on the moving image being reproduced and displayed from the disc, but in this case, the moving image becomes difficult to see due to the superimposition of the song name.

SUMMARY OF THE INVENTION The present invention has been made in view of such problems, and has as its object to make it possible to display music titles and the like satisfactorily in this type of reproduction system.

[0008]

A communication system according to the present invention comprises: reproducing means for reproducing sound and image data stored in a storage medium; receiving means for receiving image data from outside; and output means for outputting image data. Means, and control means for controlling the output means to output the received image data when the reproduction means has finished reproducing the audio and image data desired by the user.

Further, according to the communication method of the present invention, a step of reproducing audio and image data stored in a storage medium, a step of outputting image data, a step of determining the end of reproduction, and a step of determining the end of reproduction And outputting the image data received from the outside.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described.
This will be described with reference to the accompanying drawings.

First, FIG. 2 shows the overall configuration of the audio / video reproduction system of the present embodiment. In this example, an optical disc (CD-ROM) on which audio data and video data (moving images) encoded by an encoding method called the MPEG1 method are recorded.
R0M), and is a system for reproducing audio and video, and is configured as a karaoke apparatus. That is, in the figure, reference numeral 10 denotes an autochanger, in which a plurality of (for example, 360) optical disks 11 are stored, two CD reproducing units 12 are arranged, and an arbitrary The optical disc 11 can be loaded into the CD reproducing unit 12.

Then, on the autochanger 10,
This reproduction data processing device 20 is mounted. The reproduction data processing device 20 is provided with the C
In addition to controlling the operation of the D reproducing unit 12 and the disk transport mechanism 13, the digital data reproduced from the CD reproducing unit 12 is demodulated into analog audio signals and analog video signals, and the analog audio signals are subjected to amplification processing and the like. To the left and right speakers 51L and 51R for reproduction. Further, the analog video signal obtained by the reproduction is transmitted to the monitor receiver 51.
To be displayed on the screen of the monitor receiver 51.

On the front of the reproduction data processing device 20, there are provided a touch key 1a for inputting a music number to be reproduced and a reproduction operation, a volume control volume 1b for adjusting a reproduction volume, and a speed control for adjusting a reproduction speed. Volume 1c
And the like (hereinafter, these keys are collectively referred to as operation keys 1), and a display panel 2 for displaying the number of the music being reproduced, the reproduction state, and the like.

Further, a plurality of microphone connection terminals 3 are provided on the front surface of the reproduction data processing device 20, and the sound picked up by the microphones 53 connected to the respective microphone connection terminals 3 is converted into the sound to be reproduced from the speakers 51L and 51R. Mixing is done.

The optical disk 11 of the present embodiment has, in addition to audio data and video data of a moving image, sub-codes recorded along with these data to record data of the title of the recorded music. The title of the song to be played back can be displayed on the screen of the monitor receiver 51 at a predetermined time based on the control of a controller described later in the playback data processing device 20.

Next, referring to FIG. 1, the configuration of a circuit block of a reproduction system centered on the reproduction data processing device 20 will be described.
The reproduction of the optical disk 11 by the reproduction data processing device 2
This is performed under the control of the system controller 21 in 0. A plurality of operation keys 1 are connected to the system controller 21, and playback control is performed based on the operation of the operation keys 1. In this case, by operating a predetermined key, it is possible to perform a reservation operation for up to nine songs to be reproduced, and the data of the reserved songs is stored in a memory (not shown) in the system controller 21. In addition, the display of the music number being reproduced on the display panel 2 is also performed in conjunction with the reproduction control based on the control of the system controller 21.

The C in the autochanger 10
The digital data reproduced by the D reproduction unit 12 is supplied to the EFM demodulation circuit 22 in the reproduction data processing device 20, and 8-1.
The demodulation of the data that has been subjected to four-frequency modulation (EFM) and recorded on the disk is performed. Then, the demodulated digital data is stored in C
The data is supplied to the D-ROM processing circuit 23, and the recorded data is extracted in accordance with the format of the CD-ROM.
This extraction processing is performed based on the control of the first central control device 29 described later.

The audio data extracted from the reproduced data is supplied to an audio demodulation circuit 24. The audio demodulation circuit 24 demodulates the audio data encoded by the MPEG1 system, and converts the demodulated audio data into an analog audio signal. And
The analog audio signal output from the audio demodulation circuit 24 is
The signal is supplied to the audio processing circuit 25, and the audio processing circuit 25 performs output processing such as amplification. The audio processing circuit 25 is supplied with an audio signal from the microphone connection terminal 3 and performs a process of mixing the audio signal supplied from the microphone 53 (see FIG. 2) connected to the microphone connection terminal 3. . Then, the audio signal processed by the audio processing circuit 25 is supplied to the left and right audio signal output terminals 6L and 6R. Then, sound is reproduced from the left and right speakers 51L, 51R connected to the output terminals 6L, 6R. The audio processing in the audio demodulation circuit 24 and the audio processing circuit 25 is performed based on the control of a first central control unit 29 described later.

The video data extracted from the reproduced data by the CD-ROM processing circuit 23 is supplied to a video demodulation circuit 26. The video demodulation circuit 26 demodulates video data encoded according to the MPEG1 system. In this case, the video demodulation circuit 26 includes at least three frame memories, and reference to video data of past frames required for demodulation of video of a moving image based on the MPEG1 system is performed using the frame memories. . The video processing in the video demodulation circuit 26 is performed by a first central control unit 29 described later.
It is performed based on the control of.

The video data demodulated by the video demodulation circuit 26 is supplied to an NTSC processing circuit 27,
A process for forming a composite video signal (hereinafter, simply referred to as a video signal) suitable for the system is performed, and the composite video signal is supplied to the first fixed contact 31 of the changeover switch 30. Further, a video signal output from an NTSC processing circuit 45 described later is supplied to a second fixed contact 32 of the changeover switch 30.

The reproduction data processing device 20 has an external video input terminal 4 to which a video signal source such as a television tuner is connected if necessary. 30 to the third fixed contact 33. Further, the reproduction data processing device 2
0 is connected to a video disk reproducing device 5, and supplies a video signal obtained by reproducing the video disk with the video disk reproducing device 5 to the fourth fixed contact 34 of the changeover switch 30. Note that the video disk reproducing device 5 is prepared as needed, and reproduction from the video disk by the reproducing device 5 is performed based on the control of the system controller 21 in the reproduction data processing device 20.

The movable contact 35 of the changeover switch 30
Is supplied to the video signal output terminal 7,
It is supplied to a monitor receiver 52 (see FIG. 2) connected to the output terminal 7 to display an image.

Further, the additional information extracted from the reproduced data by the CD-ROM processing circuit 23 is supplied to the additional information processing circuit 28, and the additional information demodulated by the processing in the additional information processing circuit 28 is stored in the first central processing unit. It is supplied to the control device 29. The first central control unit 29 is a microcomputer that controls the processing of data reproduced from a disk. The switching of the changeover switch 30 described above is also performed under the control of the first central control device 29.

Then, the reproduction data processing device 20 of this embodiment
Is provided with a second central control device 41 different from the first central control device 29, and a reservation screen for displaying a song name, an operation state, and the like reserved under the control of the second central control device 41. Is created. The video data creation control by the second central control device 41 is performed based on the control of the system controller 21, and the title of the music included in the additional information supplied from the additional information processing circuit 28 to the first central control device 29. And the information of the number
Is supplied to the central control device 41.

The second central control unit 41 has R
The OM 42 and the RAM 43 are connected to each other, and the ROM 42 stores in advance the data of the music title and the music number of the disk 11 arranged in the autochanger 10, and the RAM 43 reproduces the data from each disk 11 by a predetermined reading operation. The song name and song number data are stored. In the case of this example, a flash memory is used as the RAM 43, so that stored data remains in the memory even without a backup power supply.

A video processor 44 is connected to the second central control unit 41, and a ROM 42 and a RAM 43
The video processor 44 causes the video processor 44 to create video data of the reservation screen using the data of the music title and the music number stored in the storage device and the data of the current operation state and the reservation state supplied from the system controller 21. In this case, the video processor 44 has a built-in character generator that stores display data such as characters, numbers, and figures, and creates video data to be displayed using the data stored in the character generator.

Then, the video data of the reservation screen created by the video processor 44 is supplied to an NTSC processing circuit 45 to generate an NTSC video signal, and this video signal is supplied to a second fixed contact 32 of the changeover switch 30. At the same time, the signal is supplied to the video signal output terminal 8. The video signal output terminal 8 is connected to a monitor receiver (not shown) dedicated to reservation display, which is different from the monitor receiver 52 shown in FIG. However, the monitor receiver dedicated to the reservation display may be prepared as needed.

Next, a description will be given, with reference to a flow chart of FIG. 3, of an operation at the time of performing reproduction using the reproduction system configured as described above.

First, the system controller 21 determines whether or not there is a song reserved for reproduction (step 1).
01) If there is no reserved song, a display screen indicating that the reservation is being accepted is created under the control of the second central control unit 41, output from the NTSC processing circuit 45, and the changeover switch 30 The movable contact 35 is connected to the second fixed contact 32, and the reservation receiving screen is displayed on the monitor receiver 52 (step 102).

As a reservation reception screen displayed at this time, for example, as shown in FIG. 4, a display area of nine reserved songs is set, and a reservation operation for inputting a song number is performed, and the number is displayed. Is searched from the data stored in the ROM 42 and the RAM 43, and the song number and the song title are displayed in order from the top. FIG. 4 shows a state where only one song has been input. Here, the song number display “2-6” indicating the sixth song of the disc number 2 and the song title “green horizon” are displayed in the first song display area. Is displayed in. In this case, "please make a reservation" is displayed at the same time as this reserved song display as a display prompting a reservation operation.

When this reservation reception screen is displayed, the system controller 21 returns to step 101 to determine whether or not there is a reserved song. Then, if there is a reserved music, it is determined whether or not the music is in a standby state in which the reserved music can be reproduced (step 103).
That is, in the system of the present example, when a song is reserved, under the control of the system controller 21, the disc on which the reserved song is recorded is loaded into any one of the disc reproducing units 12, and the loaded disc is loaded. A search operation is performed to search for a recording location of the corresponding music from. And step 1
In step 03, it is determined whether or not the search operation for the music to be reproduced next has been completed. If the search operation has not been completed, the display screen indicating that the search is being performed is displayed on the second central control device. NTSC processing circuit 4
5 is output (step 104). At this time, the movable contact 35 of the changeover switch 30 maintains the state of being connected to the second fixed contact 32, and causes the monitor receiver 52 to display the screen during the search.

As a screen during the search displayed at this time, for example, as shown in FIG. 5, up to nine pieces of reserved music similar to the reserved display screen are displayed, and a display notifying that the search is being performed is displayed. "Please wait for a while until the performance." FIG. 5 shows a state in which five music pieces have been reserved.

In this embodiment, since two disk reproducing units 12 are prepared, while one disk reproducing unit 12 is performing reproduction, the other disk reproducing unit 12 loads and reserves the next reserved music. A search operation is possible. In such a case, the screen proceeds to the next step without displaying the screen during the search.

When a screen indicating that the search is being performed is displayed, the system controller 21 returns to step 103 to determine whether or not it is in the standby state. Then, when the standby state is entered, a display screen indicating the standby state is created under the control of the second central control unit 41 and output from the NTSC processing circuit 45 (step 105). At this time, the movable contact 35 of the changeover switch 30 maintains the state of being connected to the second fixed contact 32, and the monitor receiver 52
Display this standby screen.

As the standby state screen displayed at this time, as shown in FIG. 6, for example, up to nine reserved music pieces are displayed in the same manner as the reserved display screen and the screen during the search, and the standby state is set. The message "Press the start key."

Then, in this state, the system controller 21 determines whether or not the start key of the operation keys 1 has been operated (step 106), and keeps displaying the standby state until the start key is operated.

If it is determined in step 106 that the start key has been operated, the system controller 21 starts reproduction of the corresponding music on the disk 11 loaded in the disk reproduction unit 12, and reproduces the reproduction data of this music. The playback processing is performed based on the control of the first central control unit 29, and the audio signals obtained by the playback are output from the output terminals 6L and 6R, and are reproduced from the speakers 51L and 51R. The video signal is output from the NTSC processing circuit 27. Then, at this time, the movable contact 35 of the changeover switch 30 is switched to the first fixed contact 31, and the image of the moving image reproduced from the disk 11 is displayed on the screen of the monitor receiver 52 connected to the output terminal 7 ( Step 107).

While audio and video are being reproduced from the disc, the system controller 21
Then, it is determined whether or not a redo key among the operation keys 1 is operated (step 108). When it is determined that the redo key has been operated, a display screen for instructing re-input of the music to be reproduced or the like is created under the control of the second central control unit 41 and output from the NTSC processing circuit 45. (Step 109). At this time, the changeover switch 3
The 0 movable contact 35 is switched to the second fixed contact 32, and the monitor receiver 52 displays a screen for instructing this re-input.

As a screen for instructing re-entry displayed at this time, as shown in FIG. 7, for example, up to nine reserved tunes are displayed in the same manner as the reserved display screen and the screen during the search, and the re-input is performed. Is displayed as "Please enter again." However, in the display in this case, the second display area from the top is the display of the first reserved song (that is, the leftmost number is 1, 2, 3 ‥‥ from the second display area), and Is a display area of the music to be re-input, and the music that has been reproduced is displayed until the input is performed again.

In this state, when a music number is input by the operation key 1, the music name displayed at the top is changed to the music of the newly input number, and step 10 is executed.
Returning to step 6, it is determined whether or not the start key has been operated.
Move to the playback of the newly input song.

In some cases, the same tune is reproduced again from the beginning without changing the tune number. In such a case, operating the redo key and displaying the screen for instructing re-entry will be displayed. It is played again from the beginning.

Next, the system controller 21 determines whether the music has been reproduced to the end (step 1).
10) If it has been played back to the end, the process returns to step 101 to determine whether there is a next reserved song, and displays a corresponding reservation screen until the start key is operated (FIGS. 4 to 6).
) Is performed.

When another monitor receiver dedicated to reserved display is connected to the video signal output terminal 8, the monitor receiver dedicated to reserved display is always connected to the monitor receiver dedicated to reserved display, regardless of the state of the changeover switch 30. The reservation screen shown in FIG. 7 is displayed.

In the case of this example, the display color of the display area of the uppermost reserved music when displaying the reservation screen is shown in FIG.
7 is changed on each reservation screen shown in FIG. The setting of the display color is performed under the control of the second central control device 41.

The image displayed on the monitor receiver 52 in this manner is different from the display of the image reproduced from the disk 11,
By automatically switching to the display of the reservation screen, the reservation screen can be displayed well. That is, the disk 11
In the state where audio and video are not being played from (the state between songs), the song name and song number that have been reserved are displayed automatically, and the reservation status can be changed without any operation for calling the reservation screen. You can check. And while the reserved song is being played, only the played video is displayed,
The reproduced video is not difficult to see by displaying the reserved music.

When the reservation display is performed, the display of the current reproduction control state can be immediately understood from the display screen by simultaneously displaying the reservation reception, search, standby state, re-input instruction, and the like. Usability as a playback device is improved.

In the above-described embodiment, the movable contact 35 of the changeover switch 30 is connected to the second fixed contact 32 in the state of a music piece, and the reservation screen is displayed on the monitor receiver 52. When it is not necessary to display the reservation screen (for example, when the reservation screen can be recognized by another monitor receiver connected to the output terminal 8), when the music is not reproduced from the disk 11, The movable contact 35 is connected to the third fixed contact 33 or the fourth fixed contact 34 so that the video from another video signal source connected to the input terminal 4 or the video from the video disk reproducing device 5 can be received by the monitor. It may be displayed on the device 52. Such a setting can be made, for example, by causing the system controller 21 to set a display mode between songs.

In the above-described embodiment, the song title and the song number are displayed as the reserved song information displayed on the reservation screen. However, if more detailed information can be obtained, the detailed information (for example, the composer (Name, lyricist name, singer name, lyrics at the beginning of the song, etc.) may be displayed at the same time.

In the above embodiment, an optical disk (CD-RO) to which a recording system called the MPEG1 system is applied.
M) is a karaoke playback system for audio and moving images, but can also be applied to karaoke playback systems using other recording methods and recording media. For example, the present invention can be applied to a karaoke reproduction system that reproduces audio and still images from a disk.
Further, the present invention can be applied to audio and video reproduction systems other than the karaoke apparatus.

Further, it is needless to say that the present invention is not limited to the above-described embodiment, but can take various configurations without departing from the gist of the present invention.

[0051]

According to the present invention, when the reproduction of one unit of audio data and video data from the storage medium is completed, another video data is selected by the switching means so that the reproduced video is completed. Automatically switches to another video, and the switching between the reproduced video and the other video is performed appropriately. For this reason, for example, by applying to a karaoke system, every time the reproduction of the audio and video of one music from the storage medium (disc) is completed, the display is switched to another video such as a music title, and the automatic video is displayed. Switching is performed properly.

In this case, when the reproduction of the next one unit of audio data and video data from the storage medium is started, the video output from the reproduction means is switched from the state where other video data is selected by the switching means. By returning to the data selection state, another video is displayed between the songs from the end of the playback of one song to the start of the playback of the next song, and the display of the video data to be played back , And another image is displayed well.

Further, by displaying song name display video data such as song title data to be reproduced from the storage medium as other video in this case, the display of the reproduced video data is not disturbed at all, and And the like are displayed satisfactorily.

Further, according to the present invention, the song title display and the playback status indication are simultaneously displayed on the same screen by the song title display video data, so that the playback status can be determined when the song title is displayed on a monitor receiver or the like. Usability is improved.

In each case, the song title display video data includes the song title data reserved for reproduction, so that the song title reserved between songs and the like is automatically displayed, and the usability is improved. Is improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a circuit block according to an embodiment of the present invention.

FIG. 2 is a perspective view showing an entire system configuration according to an embodiment of the present invention.

FIG. 3 is a flowchart showing display switching according to one embodiment.

FIG. 4 is an explanatory diagram showing a display example during reservation according to an embodiment;

FIG. 5 is an explanatory diagram showing a display example during a search according to an embodiment;

FIG. 6 is an explanatory diagram showing a display example during standby according to one embodiment;

FIG. 7 is an explanatory diagram showing a display example during re-input according to the embodiment;

[Explanation of symbols]

6L, 6R audio signal output terminal, 7, 8 video signal output terminal, 10 autochanger, 11 optical disk, 1
2 CD playback unit, 21 system controller, 29
1st central control unit, 30 output video changeover switches, 4
1 second central control unit, 42 ROM, 43 RAM

Claims (4)

[Claims] A reproducing means for reproducing sound and image data stored in a storage medium; a receiving means for receiving image data from outside; an output means for outputting the image data; Control means for controlling the output means to output the received image data when the reproduction of the audio and image data is completed. A display unit for displaying the image data output by the output unit, wherein the control unit is configured to output the received data when the reproduction unit ends reproduction of the audio and image data. 2. The communication system according to claim 1, wherein the communication unit outputs the received image data and controls the display unit to display the received image data. 3. A storage unit for storing a plurality of storage media, and an instruction unit for indicating user-desired data from audio and image data stored in the plurality of storage media, wherein the reproduction unit includes 2. The communication system according to claim 1, wherein data desired by the user is decoded and reproduced according to the MPEG system. 4. A step of reproducing audio and image data stored in a storage medium, a step of outputting the image data, a step of determining the end of the reproduction, and a step of determining the end of the reproduction. Outputting image data received from the outside.