JP2005227787A - Data recording method and data reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To process voice signals recorded in multi-channels for karaoke. <P>SOLUTION: The reproduced voice data of a DVD audio disk recorded to high quality in the multi-channels is processed, so that the karaoke can be enjoyed. The audio data reproduced from the DVD audio disk in a disk reproduction section is decoded in an audio reproduction section and is then descrambled by a descrambler and is deformatted by a DVD audio deformatting process section, as a result of which the data is separated into forward left, central, forward right, backward left, and backward right voice data. Such voice data are inputted to a mixer. When a user instructs mixing, the forward left and forward right voice data and the voice data of a singing person inputted from an A/D conversion section are mixed by a mixing circuit and are made into the voice data of two channels which are outputted from output terminals 33 and 34. Thereby, the forward left and forward right voice data are used as an accompaniment to perform karaoke. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention relates to a disk encoding apparatus for recording multichannel audio data on a DVD audio disk, and a data recording method and data reproduction apparatus suitable for karaoke for reproducing multichannel audio data from a DVD disk.

Conventionally, in a CD or the like, a music source is recorded as two-channel audio data, but it can be considered to be enjoyed as a multi-channel. However, the data amount is enormous in the multi-channel as compared with the two channels, and the performance time is reduced when the storage capacity is the same.

In view of this, a DVD video is conceivable. In this DVD video, a compressed surround signal and a karaoke signal are recorded (Japanese Patent Laid-Open No. 9-46799), and karaoke can be dealt with.

In the karaoke mode of this conventional karaoke compatible device (Japanese Patent Laid-Open No. 9-46799), the karaoke left (L) and right (R) accompaniment, female vocal A2-1, male vocal A2-2 are Dolby-AC-3. The function as a karaoke is realized by being recorded in an audio stream conforming to the standard, downmixed during reproduction, and output in two channels.

However, although the above-described conventional apparatus diverts the compressed surround system, the amount of data is saved, but there is a drawback in that quality loss due to compression and restrictions on sampling frequency, number of bits, and the like.

To avoid this, DVD audio discs that respect DVD video and require compatibility with it have no loss of quality due to compression, high-quality multichannel audio data with a sampling frequency of 192 kHz and a bit number of 24 bits. Expectation to store is increasing.

In addition, it is required to process the audio signal of each channel so that a DVD audio disk recorded in multiple channels can be played and used as karaoke. Furthermore, there is a demand for recording a multi-channel audio signal on a DVD disk, recording a still image or a moving image, reproducing the still image or moving image at the time of karaoke, and using it as a background, etc., to increase the atmosphere at the time of karaoke. Has been made.

In order to answer the above-described conventional problems, the present invention provides a disk encoding apparatus for recording audio signals with high quality by multi-channel and playback from each channel of a DVD audio disk recorded with high quality by multi-channel. An object of the present invention is to provide a data recording method and a data reproducing apparatus capable of processing an audio signal for karaoke and reproducing a still image or a moving image as necessary.

The present invention comprises the following means 1) to 3) in order to solve the above problems.
That is,
1) formatting multi-channel audio data in accordance with a standard audio disc standard;
Formatting a mixdown coefficient for mixing down the multi-channel audio data and a table number of the mixdown coefficient as control data;
Recording control data including the formatted multi-channel audio data, a mix-down coefficient for mixing down the formatted multi-channel audio data, and a table number of the mix-down coefficient;
A data recording method comprising:
2) In a data reproducing apparatus for reproducing data recorded by the data recording method according to claim 1,
First decoding means for decoding audio data from the recorded data;
Means for separating the decoded audio data into multi-channel audio data;
Second decoding means for decoding a mixdown coefficient and a table number of the mixdown coefficient from the recorded data;
Mixdown means for mixing down the separated audio data according to the table of the decoded mixdown coefficient and the mixdown coefficient;
Output means for outputting the mixed-down audio data;
A data reproducing apparatus comprising:
3) In a data reproducing apparatus for reproducing data recorded by the data recording method according to claim 2,
A data reproducing apparatus comprising means for mixing an audio signal collected by a microphone with the separated audio data.

According to the present invention, since the mix of the multi-channel output can be changed, for example, the output of two channels including “karaoke” can be changed and enjoyed in various ways according to the usage of the user.
In addition, playback audio data from each channel of a DVD audio disk recorded with high quality in a multi-channel can be processed with a mixdown coefficient, and the mix can be changed as necessary. It has the effect of improving usability.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a first embodiment of a disk encoding apparatus applied to the present invention. The disk encoding apparatus modulates a signal from a DVD audio formatting processing unit 1 that formats a multi-channel audio signal in accordance with a DVD audio format standard, a scrambler 2 that scrambles formatted data, and a signal from the scrambler 2. Modulation unit 3, system controller 4 for controlling the entire apparatus, operation input unit 5 for inputting user instructions, and interface (I / F) for inputting mixing coefficients necessary for formatting by the DVD audio formatting processing unit 1 6) Interface (I / F) 7 for inputting image / character data, input terminal 8 for inputting front left audio data (FL), input terminal 9 for inputting central audio data (C), front right Input terminal 10 for inputting voice data (FR); Data is output to an input terminal 11 for inputting left-side audio data or left vocal (RL / KL), an input terminal 12 for inputting rear right audio data or right vocal (RR / KR), a cutting machine, or the like. Output terminal 13 is provided.

Next, the operation of this embodiment will be described. 5-channel front left audio data (FL), center audio data (C), front right audio data (FR), rear left or left vocals input from input terminals 8, 9, 10, 11, 12 Audio data (RL / KL) and rear right or right vocal audio data (RR / KR) are input to the DVD audio formatting processing unit 1, where they are formatted from the interface 6 into 5-channel audio data, After being scrambled by the scrambler 2, the signal is modulated by the modulation unit 3, and then output from the output terminal 13 to a cutting machine (not shown), thereby creating a DVD audio disk on which the above-described 5-channel audio data is recorded.

When mixing the left and right vocals (KL / KR), the DVD audio formatting processing unit 1 mixes and formats the left and right vocals according to the mix coefficient input from the interface 8.

At this time, character data indicating a menu image of the recorded contents and a background image for karaoke are also input from the interface 7 to the DVD audio formatting processing unit 1 and formatted together with the audio data described above.

According to the present embodiment, the front left, center, front right, back left, and back right audio data of 5 channels can be recorded on the DVD audio disk, and the capacity of the DVD audio disk is large. It is not necessary to compress the 5-channel audio data, and can be recorded on the disk with a sufficiently high sampling frequency, high bit, etc., and the 5-channel audio data can be recorded for a long time with high sound quality.

FIG. 2 is a block diagram showing a second embodiment of the disk encoding apparatus of the present invention. However, the same parts as those in the first embodiment shown in FIG. 1 are denoted by the same reference numerals, and the description thereof will be omitted as appropriate. The disk encoding device shows audio data from a DVD audio formatting processing unit 1 that formats a multi-channel audio signal in accordance with the DVD audio format standard, a scrambler 2 that scrambles the formatted data, and a scrambler 2. A transmitter 14 for transmitting on a line not to be transmitted, a receiver 17 for receiving voice data on a line (not shown), a system controller 4 for controlling the entire apparatus, an operation input unit 5 for inputting a user instruction, and voice data are stored. Memory 15, interface (I / F) 6 for inputting coefficients necessary for formatting by the DVD audio formatting processing unit 1, interface (I / F) 7 for inputting image and character data, and control coefficients Interface (I / ) 16, an input terminal 8 for inputting the left audio data (L), the input terminal 9 for inputting voice data of the right (R), has an input terminal 10 for inputting a vocal audio data (K).

Next, the operation of the present embodiment will be described. The DVD audio formatting processing unit 1 in this example formats the left and right audio data and vocals input from the input terminals 8, 9 and 10 according to the mix coefficient and control coefficient input from the interfaces 6 and 16, and scrambles them. The multi-channel audio data scrambled at 2 is transmitted from the transmission unit 14 through a line, or is supplied from the modulation unit 3 to a cutting machine (not shown) and recorded on a DVD audio disk.

The audio data transmitted from the transmission unit 14 is sent to a remote editing device and edited and then returned, and this return data is received by the reception unit 17 and stored in the memory 15 via the system controller 4. Once stored. Thereafter, it is recorded on a DVD audio disk or the like. In some cases, the audio data output from the scrambler 2 is temporarily stored in the memory 15 by the system controller 4 and then transmitted from the transmission unit 14.

According to the present embodiment, it is possible to create a DVD audio disc in which audio data of left and right and vocal three channels are recorded, and to transmit and receive these audio data. Other effects are the same as those of the first embodiment shown in FIG.

FIG. 3 is a block diagram showing a third embodiment of the disk encoding apparatus of the present invention. However, the same parts as those in the first embodiment shown in FIG. 1 are denoted by the same reference numerals, and the description thereof will be omitted as appropriate. The DVD audio formatting processing unit 1 of this example has a front left audio data (FL), a center audio data (C), a front right audio input from input terminals 8, 9, 10, 11, 12, 19 respectively. Audio data (FR), rear left audio data (RL), left vocal (KL), rear right audio data (RR) or right vocal and LFE are formatted according to the mix coefficients input from the interface 6, After being scrambled by the scrambler 2, modulated by the modulation unit 3 and then recorded on a DVD audio disk by a cutting machine (not shown).

In this example, in addition to image / character data, moving image / still image data input from the interface 20 can be formatted by the DVD audio formatting processing unit 1 and recorded on the DVD audio disk.

According to the present embodiment, it is possible to create a DVD audio disc in which audio data of 6 channels of front left, center, front right, rear left, rear right and LFE is recorded, and the DVD audio disc capacity is large. Therefore, it is not necessary to compress 6-channel audio data, and it can be recorded on the disk with a sufficiently high sampling frequency, high bit, etc., and the 6-channel audio data can be recorded for a long time with high sound quality. .

FIG. 4 is a block diagram showing a first embodiment of the disk reproducing apparatus of the present invention. The disc playback apparatus includes a disc playback unit 21 that reads data from the DVD audio disc 100, an audio playback unit 22 that decodes and demodulates the data read from the disc playback unit 21, and deformats the demodulated data into five channels. DVDs that are separated into the following audio data: front left (FL), center (C), front right (FR), rear left (RL) or left vocal (KL), rear right (RR) or right vocal (KR) The audio deformatting processing unit 23, the separated front left, center, front right, rear left (or left vocal), rear right (or right vocal) data is mixed by the mixing circuit 241 or output as it is. The image processor 25 for restoring the image character data, and the left vocal signal collected by the microphone (not shown) Input terminal 36 for input, input terminal 37 for input of a right vocal signal collected by a microphone (not shown), A / D converter 26 for digitizing the left vocal signal, and A / D for digitizing the right vocal signal Conversion unit 27, output terminals 28, 29 for outputting front left audio data, center audio data, front right audio data, rear left (left vocal) audio data, and rear right (right vocal) audio data, respectively. It has output terminals 33 and 34 for outputting 30, 31, 32 and 2-channel mixing audio data, and an output terminal 35 for outputting image / character data.

Next, the operation of the present embodiment will be described. The DVD audio disc 100 is reproduced by the disc reproducing unit 21, and the read data is decoded and demodulated by the audio reproducing unit 22 and further descrambled by the descrambler 41, and then by the DVD audio deformatting processing unit 23. Deformatted and separated into 5-channel audio data, ie, front left, center, front right, rear left (or left vocal), rear right (or right vocal) audio data. These five channels of audio data are output from the output terminals 28 to 32 through the mixer 24 as they are.

At that time, if the mixing coefficient is input from the DVD audio deformatting processing unit 23 to the mixer 24 and the switches SW1 and SW2 are on the terminal a side, the front left, the center, the front right, the rear left (or the left vocal), Audio data of the right rear (or right vocal) is mixed into two channels according to the mixing coefficient and output from the output terminals 33 and 34.

At this time, when image / character data is reproduced, the data is separated by the DVD audio deformatting processing unit 23 and input to the image processor 25, where it is converted into an image / character signal and output. The image is output from the terminal 35 to an external monitor or the like, and an image or text is displayed.

Further, the user selects and instructs whether or not to mix the vocal. When performing karaoke, give mix instructions. In this case, when the vocal signals are input from the input terminals 36 and 37 with the switches SW1 and SW2 on the terminal b side, these signals are converted into digital data by the A / D converters 26 and 27. These vocal data are input to the mixing circuit 241, mixed with the front left, center, and front right audio data into two channels and output from the mix output terminals 33 and 34. In this case, for example, the level of the central audio data is 0, and the front left and front right audio data are accompanied by karaoke, mixed with the vocal of the singer, and output from the output terminals 33 and 34.

Here, the operation of the mixing circuit 241 will be described in detail. When mixing audio data, the mixdown coefficient table number is used, and when not mixing, the mixdown coefficient table number i is incremented by one and changed. When the mixdown coefficient table is counted up by one (ATS-DM-COEFT # (i + 1)), mixing is performed with channels RL / KL and RR / KR set to zero.

When mixing only the channel RL / KL, the mixdown coefficient table number i is incremented by two, and when mixing only the channel RR / KR, the mixdown coefficient table number i is incremented by three. To change. As a result, predetermined mixed audio data is extracted from the output terminals 33 and 34.

According to the present embodiment, it is possible to process playback audio data from each channel of the DVD audio disk 100 recorded with high quality in multi-channel for karaoke, and playback image and text information as necessary. can do.

FIG. 5 is a block diagram showing a second embodiment of the disk reproducing apparatus of the present invention. However, the same parts as those in the first embodiment shown in FIG. 4 are denoted by the same reference numerals, and the description thereof is omitted as appropriate. This example has almost the same configuration as the first embodiment shown in FIG. The difference is that after the vocal signals input from the input terminals 36 and 37 are converted into digital data, the digital data is transmitted from the monitor output terminals 53 and 54 to the outside by passing through a switch circuit composed of switches SWL and SWR. The point is that it can be output.

When the switches SWL and SWR are switched to the terminal a side, only the voice of the singer is obtained from the monitor output terminals 53 and 54, so that this can be heard by the singer via a headphone or the like. When the switches SWL and SWR are switched to the terminal b side, only the rear left (or left vocal) and rear right (or right vocal) reproduced from the DVD audio disk are output from the monitor output terminals 53 and 54 for monitoring. be able to.

FIG. 6 is a block diagram showing a third embodiment of the disk reproducing apparatus of the present invention. However, the same parts as those in the first embodiment shown in FIG. 1 are denoted by the same reference numerals, and the description thereof will be omitted as appropriate. In this example, a DVD audio disc on which three channels of audio data of left (L), right (R), center (C) or vocal (K) are recorded is reproduced and used for karaoke.

The audio data reproduced and demodulated from the DVD audio disk is descrambled by the descrambler 41, deformatted by the DVD audio deformatting processing unit 23, and separated into 3-channel audio data. Is input to the mixer 24.

The mixing coefficient / control coefficient is input to the mixer 24 from the DVD audio deformatting processing unit 23. For example, the center (C) or vocal (K) is set to the left (L), and the right (R) is set to the right (R). The center (C) or vocal (K) is mixed and output from the output terminals 28 and 29. Further, the left (L), right (R), center (C), or vocal (K) may be output as they are from the output terminals 30, 31, 32 without being mixed at all.

On the other hand, when used in karaoke, the mixer 24 outputs the left (L) and right (R) audio data as they are at the level (α = γ = 1) from the output terminals 30 and 32, and the center (C) or The vocal (K) is set to level zero, and as a result, it is not output from the output terminal 31 (β = 1). Instead, the vocal data digitized by the A / D converter 26 is output from the output terminal 31. .

Accordingly, karaoke can be performed with the left (L) and right (R) audio data reproduced from the DVD audio disc as an accompaniment. At that time, the image or still image processed by the image processor 25 can be used as the background of karaoke.

Further, the MIDI signal is supplied to the MIDI processor 38, converted into a music signal, and taken out from the output terminal 39. Thereby, for example, accompaniment sounds by a plurality of musical instruments such as a piano, a guitar, and a bass can be obtained.

According to the present embodiment, it is possible to play a 3-channel DVD audio disc of left (L), right (R), center (C) or vocal (K) and enjoy karaoke with high-quality accompaniment. .

FIG. 7 is a block diagram showing a fourth embodiment of the disk reproducing apparatus of the present invention. However, the same parts as those of the third embodiment shown in FIG. 6 are denoted by the same reference numerals, and the description thereof is omitted as appropriate. This example has almost the same configuration as that of the third embodiment shown in FIG. The difference is that by switching the switch circuit SW60, the playback sound (singer) from the DVD audio disk or the sound of the singer at the time of karaoke can be output from the output terminal 39 and monitored. Other configurations have the same effects as those of the third embodiment shown in FIG.

FIG. 8 is a block diagram showing a fifth embodiment of the disk reproducing apparatus of the present invention. However, the same parts as those in the first embodiment shown in FIG. 1 are denoted by the same reference numerals, and the description thereof will be omitted as appropriate. Audio data obtained by playing back a 6-channel DVD audio disk and descrambling the obtained demodulated data is input from the input terminal 42 to the DVD audio deformatting processing unit 23, deformatted, and forward left (FL) , Center (C), front right (FR), rear left or left vocal (RL / KL), rear right or right vocal (RR / KR), and LFE. These audio data are input to the mixer 24, and each audio data is mixed by the mix coefficient / control coefficient, or is output as it is from the output terminals 28 to 32, 43 without being mixed.

The still image and moving image data deformatted by the DVD audio deformatting processing unit 23 is converted into an NTSC video signal by the video conversion unit 44 and output from the output terminal 45 to the outside.

When the mixer 24 does not mix data, the audio data of 6 channels of front left, center, front right, rear left (left vocal), rear right (right vocal), and LFE are output terminals 28, 29, 30, 31, 32, 43.

On the other hand, when data is mixed by the mixer 24, the front left (FL) and the center (C) or vocal (K) and the front right (FR), center (C) or vocal (K) are mixed, and the output terminal In this case, when the mixing coefficients α, β, and γ take values of 1 or 0, the mixing of the multi-channel output can be changed.

For example, if (1) β = 0 and α = γ = 1, the central (C) audio data is not output from the output terminal 29, and the central (C) audio is mixed from the output terminals 28 and 30. Front left (FL) and front right (FR) audio data is output, and the audio and accompaniment can be mixed and reproduced in two channels. The mixed output in this case is also taken out from the output terminals 33 and 34.

(2) If α = γ = 0 and β = 0, only the front left (FL) and front right (FR) audio data (accompaniment channel) is reproduced from the output terminals 28 and 30, and the output terminal 29 Audio can be erased. The mixed output in this case is also taken out from the output terminals 33 and 34.

At this time, the vocal signal of the singer input from the input terminals 36 and 37 is digitized by the A / D converters 46 and 47 and then added by the adder 48 to obtain one-channel audio data. When input to the mixer 24, since the mixer 24 outputs vocal data from the output terminal 29, the voice data reproduced from the output terminals 28 and 30 can be sung in karaoke.

(3) If β = 1 and α = γ = 0, a normal multi-channel can be reproduced.

Further, the mixing condition of the mixer 24 can be corrected using the system controller 49. For example, in the above (1), if α = 0.5, the voice moves to the left, so it is just right for the driver on the right in the car audio.

The still image or moving image is decoded by the DVD audio deformatting processing unit 23, converted into an NTSC signal by the video conversion unit 44, and taken out as a video signal. This still image or moving image is recorded on a DVD audio disc as a background image of karaoke by the disc encoding apparatus shown in FIG. 3, and is reproduced together with audio data from the DVD audio disc.

This embodiment also has the same effect as the first embodiment. The audio data may be a 1-bit stream signal in addition to the PCM signal. In this case, the 2-channel output is not provided due to the difficulty of mixing, but only the multi-channel output is provided, and the function is realized by selecting the vocal channel without mixing or by muting.

FIG. 9 is a block diagram showing a sixth embodiment of the disk reproducing apparatus of the present invention. However, the same reference numerals are given to the same parts as those in the fifth embodiment shown in FIG. 8, and the description thereof will be omitted as appropriate. This example has almost the same configuration as the fifth embodiment shown in FIG. By switching the switch circuit SW70, the playback sound (singer) from the DVD audio disk or the sound of the singer at the time of karaoke can be output from the output terminal 39 and monitored. Other configurations have the same effects as those of the fifth embodiment shown in FIG.

In addition, in order to change the mixing conditions, it has been described that the system controller 49 is used. However, an audio title set having mixing coefficients corresponding to a plurality of modes is prepared in advance, and the audio titles are set. You may make it change mixing conditions by selecting.

1 is a block diagram showing a first embodiment of a disc encoding apparatus applied to the present invention. It is the block diagram which showed 2nd Embodiment of the disk encoding apparatus applied to this invention. It is the block diagram which showed 3rd Embodiment of the disk encoding apparatus applied to this invention. 1 is a block diagram showing a first embodiment of a disc playback apparatus of the present invention. FIG. It is the block diagram which showed 2nd Embodiment of the disc reproducing | regenerating apparatus of this invention. It is the block diagram which showed 3rd Embodiment of the disc reproducing | regenerating apparatus of this invention. It is the block diagram which showed 4th Embodiment of the disc reproducing | regenerating apparatus of this invention. It is the block diagram which showed 5th Embodiment of the disc reproducing | regenerating apparatus of this invention. It is the block diagram which showed 6th Embodiment of the disc reproducing | regenerating apparatus of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 DVD audio formatting process part 2 Scrambler 3 Modulation part 4, 49 System controller 5, 50 Operation input part 6, 7, 16, 20 Interface 8, 9, 10, 11, 12, 19, 36, 37, 40, 42 Input terminal 13, 28, 29, 30, 31, 32, 33, 34, 35, 39, 43, 45, 53, 54 Output terminal 14 Transmitter 15 Memory 17 Receiver 18 and 51 Display unit 21 Disc playback unit 22 Audio playback unit 23 DVD audio deformatting processing unit 24 Mixer 25 Image processor 26, 27, 46, 47 A / D conversion unit 38 MIDI processor 41 Descrambler 44 Video conversion unit 48 Adder 241 Mixing circuits SW60, SW70, SWL, SWR switch

Claims (3)

Formatting multi-channel audio data in accordance with a standard audio disc standard;
Formatting a mixdown coefficient for mixing down the multi-channel audio data and a table number of the mixdown coefficient as control data;
Recording the formatted multi-channel audio data and control data including a mix-down coefficient for mixing down the formatted multi-channel audio data and a table number of the mix-down coefficient;
A data recording method comprising: A data reproducing apparatus for reproducing data recorded by the data recording method according to claim 1,
First decoding means for decoding audio data from the recorded data;
Means for separating the decoded audio data into multi-channel audio data;
Second decoding means for decoding a mixdown coefficient and a table number of the mixdown coefficient from the recorded data;
Mixdown means for mixing down the separated audio data according to the table of the decoded mixdown coefficient and the mixdown coefficient;
Output means for outputting the mixed-down audio data;
A data reproducing apparatus comprising: A data reproducing apparatus for reproducing data recorded by the data recording method according to claim 2, further comprising:
A data reproducing apparatus comprising means for mixing an audio signal collected by a microphone with the separated audio data.

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