JP2008160179A - Audio reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an audio reproducing device improving user-friendliness by outputting all audio signals of multiple channels without increasing the number of audio output terminals. <P>SOLUTION: The audio reproducing device has a means (13) of reading a digital signal recorded in a recording medium (12) therefrom, a means (14) of separating a main audio signal and other audio signals from the read digital signal, a first interface means (18) of outputting all channels of the separated main audio signal to the outside, and a second interface means (22) of outputting the audio signals other than the separated main audio signal to the outside. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an improvement in an audio reproduction device used for an optical disk reproduction device such as an HD (high definition) DVD (digital versatile disk) player.

  As is well known, an optical disc playback apparatus such as that described above has a video output terminal and an audio output terminal for outputting video signals and audio signals obtained by reproducing an optical disc to the outside, and has an audio playback function. For example, audio playback is performed by connecting an AV (audio video) amplifier or the like provided to an audio output terminal.

  By the way, at present, audio signals of up to 7.1 channels can be recorded on HD DVD. In addition, in the case of HD DVD advanced contents, in addition to the 7.1 channel main (main) audio signal, it is possible to simultaneously output 2 channels of sub (sub) and effect (effect) audio signals. Yes.

  Thus, in the present situation where the number of channels of audio signals obtained from the optical disc is increasing, the optical disc playback apparatus is configured to receive audio signals of a plurality of channels in order to prevent the number of audio output terminals from being increased excessively. It is mixed and output from the audio output terminal.

  For this reason, at present, a high performance AV amplifier or the like having a function of reproducing a multi-channel audio signal is connected to the audio output terminal of the optical disc reproducing apparatus, and the audio signals of a plurality of channels obtained from the optical disc are respectively connected. It is impossible to use it independently for high-quality sound playback.

Patent Document 1 has an audio decoding function by mixing an audio signal of a plurality of channels acquired from an optical disk, performing an encoding process on the mixed audio signal, and outputting the mixed audio signal to the outside in an optical disc reproducing apparatus. A configuration is disclosed in which an AV amplifier or the like can be connected.
JP 2006-197391 A

  Therefore, the present invention has been made in consideration of the above circumstances, and can output all multi-channel audio signals without increasing the number of audio output terminals, and can be handled conveniently for the user. An object of the present invention is to provide an audio playback device.

  An audio reproducing apparatus according to the present invention includes a reading unit that reads a digital signal recorded therein from a recording medium, and a separating unit that separates a main audio signal and other audio signals from the digital signal read by the reading unit. First interface means for outputting all channels of the main audio signal separated by the separation means to the outside, and second interface means for outputting audio signals other than the main audio signal separated by the separation means to the outside It is intended to provide.

  According to the above-described invention, since the first interface means for outputting all channels of the main audio signal to the outside and the second interface means for outputting the audio signal other than the main audio signal to the outside are provided. Without increasing the number of audio output terminals, it is possible to output all multi-channel audio signals, making it easier for the user to handle.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows an example of an optical disk playback apparatus 11 as an audio playback apparatus described in this embodiment. The optical disk playback apparatus 11 has a disk drive unit 13 to which an optical disk 12 such as an HD DVD can be attached and detached.

  The disk drive unit 13 reads the recorded digital signal from the mounted optical disk 12 and outputs it to a DSP (digital signal processor) unit 14. The DSP unit 14 performs predetermined digital signal processing on the input digital signal and separates the video signal, the main audio signal, and the sub-effect audio signal.

  Then, the video signal separated by the DSP unit 14 is supplied to the video signal processing unit 15 and subjected to predetermined video signal processing such as decoding processing, and then led out to the outside through the video output terminal 16. A video display device (not shown) such as a liquid crystal monitor is connected to the video output terminal 16 so that video display is performed based on the output video signal.

  The main audio signal separated by the DSP unit 14 is supplied to the main decoder unit 17. The main decoder unit 17 performs a predetermined decoding process on the input main audio signal, converts it to a maximum 7.1-channel PCM (pulse code modulation) signal, and transmits a high definition multimedia interface (HDMI) transmission unit 18. Is output.

  The HDMI transmission unit 18 performs conversion processing based on the HDMI standard on the PCM main audio signal and outputs the converted signal to the outside via the audio output terminal 19. That is, the HDMI transmission unit 18 can externally output a main audio signal of 7.1 channels at the maximum via the audio output terminal 19.

  Further, the sub-effect audio signal separated by the DSP unit 14 is supplied to the sub-effect decoder unit 20. The sub-effect decoder unit 20 performs a predetermined decoding process on the input sub-effect audio signal, converts the sub-effect audio signal into a PCM signal of sub (2 channels) and effect (2 channels), and outputs it to the mixer unit 21. ing.

  The mixer unit 21 mixes sub- (two-channel) and effect (two-channel) audio signals that have been converted to PCM to generate a two-channel sub-effect audio signal, and a DIT (digital interface transmitter) unit 22. Is output. The DIT unit 22 performs a conversion process based on the optical interface standard based on IEC (international electrotechnical commission) 60958/61937 on the input sub-effect audio signal, and outputs it to the outside via the audio output terminal 23. is doing. That is, the DIT unit 22 can externally output a 2-channel sub-effect audio signal via the audio output terminal 23.

  Here, in the optical disk reproducing apparatus 11, all the operations including the above-described various reproducing operations are comprehensively controlled by the control unit 24. The control unit 24 includes a CPU (Central Processing Unit) and the like, and the operation content is reflected based on operation information received from the operation unit 25 or from the remote controller 26 via the light receiving unit 27. Each part is controlled individually.

  In this case, the control unit 24 uses the memory unit 28. The memory unit 28 mainly includes a ROM (read only memory) storing a control program executed by the CPU, a RAM (random access memory) providing a work area for the CPU, various setting information, control information, and the like. Is stored in a non-volatile memory.

  FIG. 2 shows an example of an AV amplifier 29 that is connected to the audio output terminals 19 and 23 of the optical disc reproducing apparatus 11 and performs audio reproduction. That is, the main audio signal output from the audio output terminal 19 of the optical disc playback apparatus 11 is received by the HDMI receiving unit 31 via the audio input terminal 30 and then supplied to the audio signal processing unit 32.

  The sub-effect audio signal output from the audio output terminal 23 of the optical disc playback apparatus 11 is received by a DIR (digital interface receiver) unit 34 via the audio input terminal 33 and then the audio signal processing unit 32. To be supplied.

  The audio signal processor 32 includes, for example, a mixer, a sampling rate converter, an audio delay controller, an audio channel setting unit, and the like according to user requirements. Thus, the main audio signal and the sub-effect audio signal can be subjected to various signal processing such as mixing between channels or signals, conversion of sampling rate, delay control, channel setting, and the like.

  The audio signal that has been subjected to predetermined signal processing by the audio signal processing unit 32 is converted into an analog audio signal by a D / A (digital / analog) conversion unit 35 and gain adjusted by an amplification unit 36. The audio signal played by the speaker 37 and reproduced by the optical disk reproducing device 11 is reproduced by the AV amplifier 29.

  According to the above-described embodiment, the optical disc playback apparatus 11 can externally output a main audio signal of 7.1 channels at the maximum from the audio output terminal 19, and can output two channels from the audio output terminal 23. Sub-effect audio signals can be output externally. That is, it is possible to output all the audio signals of all channels obtained from the optical disc 12 without mixing using only the two audio output terminals 19 and 23.

  For this reason, the AV amplifier 29 has a function of reproducing the 7.1-channel main audio signal, and the 2-channel sub-effect audio signal is returned to the sub (2-channel) / effect (2-channel) audio signal. If one having a reproduction function is used, the audio signals of all the channels (11.1 channels) obtained from the optical disc can be reproduced independently to realize high-quality audio reproduction.

  In addition, the AV amplifier 29 can mix the main audio signal and the sub-effect audio signal to output the existing 5.1 channel audio. In short, depending on the performance of the AV amplifier 29, the audio signals of all channels obtained from the optical disc 12 can be reproduced in an arbitrary form, and the degree of freedom of handling for the user can be improved.

  FIG. 3 shows a modification of the optical disc playback apparatus 11. In FIG. 3, the same parts as those in FIG. 1 are denoted by the same reference numerals. The sub-effect decoder unit 20 converts the audio signals of the sub (two channels) / effects (two channels) into mixer units. 21, the HDMI transmission unit 38 performs conversion processing conforming to the HDMI standard, and outputs the same number of channels from the audio output terminal 23 to the outside. That is, an example is shown in which the optical disc playback apparatus 11 includes two audio output terminals 19 and 23 compliant with the HDMI standard.

  FIG. 4 shows an example of an AV amplifier 29 that is connected to the audio output terminals 19 and 23 of the optical disc playback apparatus 11 shown in FIG. 4, the same parts as those in FIG. 2 are denoted by the same reference numerals, and the sub-effect audio signal output from the audio output terminal 23 of the optical disc playback apparatus 11 is received via the audio input terminal 33. The signal is received by the unit 39 and supplied to the audio signal processing unit 32.

  3 and 4 also allows the optical disc playback apparatus 11 to output audio signals of all channels obtained from the optical disc 12 using only the two audio output terminals 19 and 23. AV Depending on the performance of the amplifier 29, audio signals of all channels obtained from the optical disk 12 can be reproduced in an arbitrary form.

  Note that the present invention is not limited to the above-described embodiments as they are, and can be embodied by variously modifying the constituent elements without departing from the scope of the invention in the implementation stage. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above-described embodiments. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements according to different embodiments may be appropriately combined.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram illustrating an example of an optical disc playback apparatus according to an embodiment of the present invention. The block block diagram shown in order to demonstrate an example of AV amplifier connected to the optical disk reproducing | regenerating apparatus in the embodiment. The block block diagram shown in order to demonstrate the modification of the optical disk reproducing | regenerating apparatus in the embodiment. The block block diagram shown in order to demonstrate an example of AV amplifier connected to the modification of the optical disk reproducing | regenerating apparatus in the embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Optical disk reproducing apparatus, 12 ... Optical disk, 13 ... Disk drive part, 14 ... DSP part, 15 ... Video signal processing part, 16 ... Video output terminal, 17 ... Main decoder part, 18 ... HDMI transmission part, 19 ... Audio | voice output Terminals, 20 ... Sub-effect decoder unit, 21 ... Mixer unit, 22 ... DIT unit, 23 ... Audio output terminal, 24 ... Control unit, 25 ... Operation unit, 26 ... Remote controller, 27 ... Light receiving unit, 28 ... Memory unit , 29 ... AV amplifier, 30 ... audio input terminal, 31 ... HDMI receiving unit, 32 ... audio signal processing unit, 33 ... audio input terminal, 34 ... DIR unit, 35 ... D / A conversion unit, 36 ... amplification unit, 37 ... Speaker, 38 ... HDMI transmission unit, 39 ... HDMI reception unit.

Claims (6)

Reading means for reading a digital signal recorded therein from a recording medium;
Separating means for separating the main audio signal and the other audio signal from the digital signal read by the reading means;
First interface means for outputting all channels of the main audio signal separated by the separating means to the outside;
And a second interface means for outputting an audio signal other than the main audio signal separated by the separating means to the outside.   2. The audio reproducing apparatus according to claim 1, wherein the second interface unit mixes and outputs an audio signal other than the main audio signal separated by the separating unit.   2. The audio reproducing apparatus according to claim 1, wherein the second interface means outputs all channels of audio signals other than the main audio signal separated by the separating means to the outside.   2. The audio reproducing apparatus according to claim 1, wherein the first and second interface means comply with either the HDMI standard or the digital audio interface standard.   2. The audio reproducing apparatus according to claim 1, wherein the recording medium is an HD DVD, and the audio signal other than the main audio signal is a sub-effect audio signal. Separating means for reading the digital signal recorded there from the recording medium, separating means for separating the main audio signal and the other audio signal from the digital signal read by the reading means, and separated by the separating means 1st audio | voice provided with the 1st interface means which outputs all the channels of a main audio | voice signal outside, and the 2nd interface means which outputs audio | voice signals other than the main audio | voice signal isolate | separated by the said isolation | separation means outside A playback device;
First receiving means for receiving a main audio signal output via the first interface means; second receiving means for receiving an audio signal output via the second interface means; An audio reproduction system comprising: a second audio reproduction device including a processing unit that performs predetermined signal processing on the audio signals received by the first and second reception units and reproduces the audio. .

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