JPH0281365A - Disk reproduction device - Google Patents

Abstract

PURPOSE:To enjoy a mixing voice with an excellent tone quality by providing a sound signal switching means to mix a demodulating digital sound signal and a demodulating analog sound signal and output them when a voice switching signal inputted from an external part shows a mixing mode. CONSTITUTION:A sound signal switching means 7 inputs a demodulating analog sound signal and a demodulating digital sound signal and selects an output sound signal in accordance with the voice switching signal inputted from an external part. Namely, a voice switching means 7, when a voice switching signal 14 is an analog mode, outputs a demodulating analog sound signal 11 and when the voice switching signal 14 is a digital mode, outputs a demodulating digital sound signal 12. When the voice switching signal 14 is a mixing mode, the demodulating analog sound signal 11 and the demodulating digital sound signal 12 are mixed and outputted. Thus, a digital voice and an analog voice can be respectively separately reproduced, and in addition, the digital voice and the analog voice can be mixed and reproduced and the music can be reproduced with an excellent tone quality.

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Applicability The present invention provides a disc reproducing apparatus for reproducing recorded information on a recording disc in which a video signal, a digital audio signal, and an analog audio signal are each modulated in a predetermined manner and recorded at °C. The present invention relates to a disc playback device that mixes and outputs digital audio and analog audio as an audio signal.

2. Description of the Related Art As a conventional disc playback device, an optical video disc is known which synchronously plays back a video signal modulated and recorded on a disc-shaped recording medium and a digital audio signal or an analog audio signal. This conventional optical video disc has an audio signal switching means, and the audio signal reproduced in synchronization with the video signal is switched to either a digital audio signal or an analog audio signal at the user's selection.

FIG. 5 is a block diagram showing the configuration of the audio signal switching means of this conventional disc playback device, where 41 is an input demodulated analog audio signal, 42 is an input demodulated digital audio signal, and 43 is an output output. The audio signal 44 is audio signal switching means. In the audio switching means 44 of the conventional disc playback device configured as described above, the demodulated digital audio signal 42 and the demodulated analog audio signal 4 are
1 is selected for output as an alternative, and is output as an output audio signal 43. For this reason, conventional disc playback devices are configured so that the user can select either digital audio or analog audio recorded on the disc.

Problems to be Solved by the Invention However, with the configuration of the audio switching means as described above, in addition to switching between digital audio and analog audio for playback, it also plays a regular song with digital audio as the main audio and analog audio as the reverse audio. When playing a disc, in addition to enjoying the normal song playback with the main audio, you can also mix and play the main audio and the recovered audio to create a narration with narration. It cannot be played back as a song performance.Furthermore, as a means to solve the above problem, it is possible to record mixed audio in advance as analog audio, but since all output in mixing mode is analog audio, digital audio cannot be played. However, the problem is that the sound quality is poorer than that of mixed audio of analog audio and digital audio.

In view of the above, it is an object of the present invention to provide a disc playback device that can not only play back digital audio and analog audio separately, but also mix and play back digital audio and analog audio.

Furthermore, in the disc playback device, information indicating whether or not the content is suitable for mixing is recorded on the disc, and the disc playback device recognizes the information and allows the user to select if the content is suitable for mixing. An object of the present invention is to provide a disc playback device capable of mixing and playing back digital audio and analog audio.

Means for Solving the Problems In order to achieve this object, a disc playback device according to claim 1 of the present invention records recorded information consisting of a video signal, a digital audio signal, and an analog audio signal after each of them is modulated in a predetermined manner. a disc reproducing means for reproducing a recorded disc; a reproducing signal separating means for separating a reproducing signal outputted from the disc reproducing means into the video signal, the digital audio signal and the analog audio signal; and the reproducing signal separating means. digital audio signal demodulating means for demodulating the output digital audio signal into a demodulated digital audio signal; and analog audio signal demodulating means for demodulating the analog audio signal output by the reproduced signal separating means into a demodulated analog audio signal; video signal demodulation means for demodulating the video signal outputted by the reproduction signal separation means into a demodulated video signal; and a video signal demodulation means for demodulating the video signal outputted by the reproduction signal separation means; The present invention is a disc playback device characterized by comprising an audio signal switching means for mixing and outputting analog audio signals.

Furthermore, in addition to the disc reproducing apparatus according to claim 1, the disc reproducing apparatus according to claim 2 detects mixing permission information recorded superimposed on at least one of the digital audio signal or the video signal and generates a mixing permission signal. a control means for outputting and mixing the demodulated digital audio signal and the demodulated analog audio signal when the audio switching means outputs the mixing permission signal and the audio switching signal indicates a mixing mode; This is a disc playback device characterized by comprising an audio signal switching means for outputting an audio signal.

Function: With the above-described configuration, the present invention can not only reproduce digital audio and analog audio separately, but also mix and reproduce digital audio and analog audio.

Furthermore, when a user requests mixing, by detecting the mixing permission information superimposed on the disc, it is determined whether the content is not suitable for mixing.
If the content is not suitable for mixing, the audio switching means does not output the mixed audio of digital audio and analog audio, thereby prohibiting the mixed playback of digital audio and analog audio that is inappropriate to mix and play. can.

Embodiment FIG. 1 shows a block diagram of a disc reproducing apparatus in a first embodiment of the present invention. In Figure 1, 1
2 is an optical disc on which an analog video signal, an FM-modulated analog audio signal, and an EFM-modulated digital audio signal similar to a compact disc (hereinafter referred to as a CD) are recorded; 2 is a disc reproducing means for reproducing the optical disc; 3 is a disc reproducing means for reproducing the optical disc;
4 is a reproduced signal separating means, 4 is an analog audio signal demodulating means,
5 is a digital audio signal demodulating means, 6 is a video signal demodulating means, and 7 is an audio signal switching means.

FIG. 2(a) is a block diagram showing the internal configuration of the audio signal switching means 7 for switching the output audio signal in FIG. 14 is an input audio switching signal, and 15 is an audio signal switching means. Figure 2(b) is similar to Figure 2(a).
) is a diagram illustrating the operating principle of the audio signal switching means 15.

The operation of the disc playback device configured as described above will be described below with reference to FIGS. 1, 2(a), and 2(b). The optical disc 1 records a video signal, a digital audio signal that is EFM modulated in the same way as a CD, and an analog audio signal that is FM modulated. Introducing the main audio song and narration that enriches the image of the song are recorded as secondary audio. The disc reproducing means 2 reproduces the optical disc 1 and outputs a reproduction signal. The reproduction signal outputted by the disk reproduction means 2 is separated into a video signal, a digital audio signal, and an analog audio signal by the reproduction signal separation means 3. The separated playback signals are analog audio signals and analog audio signal demodulating means 4 respectively.
The digital audio signal is demodulated into a demodulated digital audio signal by the digital audio signal demodulating means 5, and the video signal is demodulated into a demodulated video signal by the video signal demodulating means 6.

The audio signal switching means 7 inputs the demodulated analog audio signal and the demodulated digital audio signal, and selects an output audio signal according to an externally inputted audio switching signal. There are three types of audio switching signals: analog mode, digital mode, and mixing mode. The internal configuration of the audio signal switching means 7 is shown in the block diagram of FIG. 2(a), and the audio switching means 7 demodulates the audio switching signal 14 if it is in analog mode according to the operating principle diagram of FIG. 2(b). Outputs the analog audio signal 11, outputs the demodulated digital audio signal 12 if the audio switching signal 14 is in the digital mode, and mixes the demodulated analog audio signal 11 and the demodulated digital audio signal 12 if the audio switching signal 14 is in the mixing mode. and output it.

As described above, according to this embodiment, the audio switching means 7
By providing the structure shown in the audio signal switching means block diagram of FIG. 2(a), it is possible to mix and output the demodulated digital audio signal 11, which is the main audio, and the demodulated analog audio signal 12, which is the sub audio. Can be done.

FIG. 3 shows a block diagram of a disc playback device according to a second embodiment of the present invention. In Figure 3, 2
Reference numeral 1 denotes an optical disk, 22 a disk reproducing means for reproducing the optical disk, 23 a reproduced signal separating means, 24 an analog audio signal demodulating means, 25 a digital audio signal demodulating means, 2
27 is a video signal demodulating means, 27 is an audio signal switching means, and 28 is a control means for outputting a mixing permission signal to the audio signal switching means 27. FIG. 4(a) is a block diagram showing the internal configuration of the audio signal switching means 27 for switching the output audio signal in FIG. is an output audio signal to be output, 34 is an input audio switching signal, and 35 is an input mixing permission signal. FIG. 4(b) shows that the audio signal switching means 36 is the demodulated analog audio signal 31 in FIG. 4(a).
FIG. 3 is a diagram showing the principle of operation when an output audio signal 33 is selected under the control of an audio switching signal 34 and a mixing permission signal 35 in response to an input of a demodulated digital audio signal 32. In this embodiment, the disk reproducing means 22 and the reproduced signal separating means 23
, analog audio signal demodulation means 24, and video signal demodulation means 26 have the same functions as the disk reproduction means 2, reproduction signal separation means 3, analog audio signal demodulation means 4, and video signal demodulation means 6 of the first embodiment, respectively. Therefore, the explanation of its operation will be omitted.

The operation of the disc playback device of this embodiment configured as described above will be described below as shown in FIGS. 3, 4(a), and 4.
This will be explained using Figure (b). The optical disc 21 records recording information consisting of a video signal, a digital audio signal that is EFM modulated in the same way as a CD, and an analog audio signal that is FM modulated.The digital audio signal includes a normal song as the main audio. The analog audio signal records a narration that introduces the main audio song and enhances the image of the song as a secondary audio. Further, in the digital audio signal, mixing permission information indicating whether the content is suitable for mixing is recorded in subchannels recorded by time division multiplexing. The digital audio signal separated by the reproduced signal separating means 23 is demodulated into a demodulated digital audio signal by the digital audio signal demodulating means 25, and the mixing permission information recorded superimposed on the subchannel of the digital audio signal is separated and output. be done. The control means 28 detects the mixing permission information output from the digital audio signal demodulation means 25, and outputs the mixing permission signal only when the content is suitable for mixing. Audio signal switching means 2
Reference numeral 7 inputs the demodulated analog audio signal from the analog audio signal demodulating means 24 and the demodulated digital audio signal from the digital audio signal demodulating means 25, and inputs an audio switching signal input from the outside and a mixing permission signal input from the control means 28. Select the output audio signal according to

A block diagram of the audio signal switching means 27 is shown in FIG. 4(a).
In response to the input of the demodulated analog audio signal 31 and the demodulated digital audio signal 32, the demodulated analog audio signal 31 or the demodulated digital audio signal 32 or the demodulated analog audio signal 31 and the demodulated digital audio signal are output as the output audio signal 33. One of the 32 mixed sounds is switched and output. There are three types of audio switching signals input to the audio switching means 27: an analog mode, a digital mode, and a mixing mode.
According to the operating principle diagram shown in Figure (b), the output audio signal 33
Switch. If the audio switching signal is in the analog mode, the demodulated analog audio signal 31 is output; if the audio switching signal is in the digital mode, the demodulated digital audio signal 32 is output; if the audio switching signal is in the mixing mode, the demodulated analog audio signal 31 and the demodulated digital audio are output. The signal 32 is mixed and output. However, when the mixing permission signal is not input to the audio switching means, even if the audio switching signal is in the mixing mode, the demodulated analog audio signal and the demodulated digital audio signal are not mixed and output, and the output audio signal 33 is the audio The output is in accordance with the previous mode in which the switching signal indicates the mixing mode.

As described above, according to this embodiment, by providing the control means 28 and the audio signal switching means 27 having the structure shown in the block diagram of FIG. It is possible to mix and output demodulated analog audio signals and only those audio signals that are effective.

Note that in the second embodiment, the mixing permission information was recorded as data in a subchannel that is time-division multiplexed and recorded on the digital audio signal recorded on the optical disc 21, but the recording position of the mixing permission information is However, the present invention is not limited to this, and it is also possible to record it in the video signal recorded on the optical disc 21 of the second embodiment, for example. In this case, the mixing permission information may be recorded as a video signal during the vertical blanking period of the video signal.

As described in detail, according to the present invention, a normal song is recorded in the digital audio as the main audio, and a narration that introduces the main audio song and enriches the image is recorded in the analog audio as the secondary audio. When playing a disc, you can not only enjoy playing only the songs using the main audio, but also mix the main audio and sub audio. The quality of this mixed audio is far superior to that obtained by pre-recording the mixed audio on analog audio. A specific example of the application of this mixing reproduction is the reproduction of a song on the radio, etc., in which the disc jockey's narration is overlaid with the musical performance. In this example, you can enjoy normal song playback with digital audio playback.
By playing back a mixture of digital audio and analog audio, you can enjoy listening to the disc Shirotsky's narrations with a sense of realism that could not be enjoyed with conventional disc playback devices. Another possible application of mixing playback is karaoke. Karaoke discs require two playback styles: accompaniment only playback and complete song playback with accompaniment and lyrics, but by recording accompaniment in digital audio and lyrics in analog audio, karaoke During a demonstration, only the accompaniment can be played using high-quality digital audio, and when a complete song needs to be played during karaoke practice, a mixed audio of digital and analog audio can be played to create a complete song with lyrics. You can listen to Moreover, the playback method using this mixing can play back songs with far superior sound quality than the conventional method of recording complete songs with lyrics on analog audio.

Further, according to the present invention, mixing is not permitted if the main audio and sub audio are in an inappropriate area when mixed and output, so it is possible to prevent inappropriate mixed playback due to a user's operational error. Furthermore, it is possible to prevent mixed playback of dual-language discs such as movies that have the same content recorded in Japanese and English, for example, with digital audio and analog audio in different languages, which has an extremely large practical effect.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a disc playback device in a first embodiment of the present invention, and FIG. 2(a) is a block diagram showing a detailed internal configuration of an audio signal switching means in the same embodiment.
FIG. 2(b) is a diagram of the operating principle of the audio signal switching means, FIG. 3 is a block diagram of a disc playback device in a second embodiment of the present invention, and FIG. 4(a) is used for explanation in the same embodiment. FIG. 4(b) is a block diagram showing the internal structure of the audio signal switching means in FIG. 3, FIG. 4(b) is a diagram of the operating principle of the audio switching means, and FIG. FIG. 1.21... Optical disc, 2.22... Disc playback means, 3.23... Playback signal separation means, 4.24... Analog audio signal demodulation means, 5.25.
...Digital audio signal demodulating means, 6.26... Video signal demodulating means, 7.15.27.36.44... Audio signal switching means, 28... Control means, 11.31.41... - Demodulated analog audio signal, 12.
32.42... Demodulated digital audio signal, 13.33.
... Output audio signal, 14.34... Audio switching signal. Name of agent: Patent attorney Shigetaka Kurino Figure (α) Figure

Claims (2)

[Claims] (1) a disc reproducing means for reproducing a recording disc on which recorded information consisting of a video signal, a digital audio signal, and an analog audio signal has been modulated in a predetermined manner, respectively; a reproduced signal separating means for separating a video signal, the digital audio signal and the analog audio signal; a digital audio signal demodulating means for demodulating the digital audio signal outputted by the reproduced signal separating means into a demodulated digital audio signal; Analog audio signal demodulation means for demodulating the analog audio signal output by the reproduction signal separation means into a demodulated analog audio signal; and video signal demodulation means for demodulating the video signal output by the reproduction signal separation means into a demodulated video signal. and an audio signal switching means for mixing and outputting the demodulated digital audio signal and the demodulated analog audio signal when an externally inputted audio switching signal indicates a mixing mode. playback device. (2) a disc reproducing means for reproducing a recording disc on which recorded information consisting of a video signal, a digital audio signal, and an analog audio signal has been respectively modulated in a predetermined manner; a reproduced signal separating means for separating a video signal, the digital audio signal and the analog audio signal; a digital audio signal demodulating means for demodulating the digital audio signal outputted by the reproduced signal separating means into a demodulated digital audio signal; Analog audio signal demodulation means for demodulating the analog audio signal output by the reproduction signal separation means into a demodulated analog audio signal; and video signal demodulation means for demodulating the video signal output by the reproduction signal separation means into a demodulated video signal. and a control means for detecting mixing permission information recorded superimposed on at least one of the digital audio signal or the video signal and outputting a mixing permission signal, the mixing permission signal being outputted, and The disc according to claim 1, further comprising audio switching means for mixing and outputting the demodulated digital signal and the demodulated analog signal when an externally inputted audio switching signal indicates a mixing mode. playback device.