CN1652638A - Apparatus and method for downward mixing of VF data - Google Patents
Apparatus and method for downward mixing of VF data Download PDFInfo
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- CN1652638A CN1652638A CN 200510045919 CN200510045919A CN1652638A CN 1652638 A CN1652638 A CN 1652638A CN 200510045919 CN200510045919 CN 200510045919 CN 200510045919 A CN200510045919 A CN 200510045919A CN 1652638 A CN1652638 A CN 1652638A
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Abstract
The mixing method includes following steps: determining whether user requests downward mixing; if yes, converting audio data in 5.1 channel to output of stereo audio data. The mixing device includes following parts: audio decoder capable of outputting original audio data or downward mixed data; volume and tone adjuster for processing the said output from the audio decoder and providing DAC to speaker; user's interface for providing connection interface for users; and controller for providing downward mixing command for audio decoder, if user through user's interface requests downward mixing. The invention possesses advantages of satisfying various requirements from users adequately.
Description
Technical field
The present invention relates to audio output device, the method and the device of the especially relevant 5.1 channel audio data of mixing downwards.
Background technology
Generally, at AV (audiovisual) instrument of regeneration music or film, the regeneration of sound and the pursuit of sound field are the eternal purposes of sound equipment regeneration.About tonequality, along with the recording technique of digital signal and the progress of tranmission techniques have obtained very big improvement.And about the regeneration of sound field, the multichannel regeneration that can see at the cinema in the past is exactly its answer.
About 1970,4 channel regenerations, still, because 4 complicated prices of speaker configurations are high, were disappeared on market as general home-use motion and sale gradually by each combination manufacturer greatly.
On the other hand, 1963, doctor Shi Aide of Bel (bell) research institute delivered 2 loud speakers utilizing the place ahead are made the acoustic image of any direction around the audience motion.The mode of utilizing 2 loud speakers is to measure from the reception and registration characteristic of any direction to audience's two ears, reappears the mode of above-mentioned reception and registration characteristic again with 2 loud speakers in the place ahead.
The mid-1970s utilizes 2 loud speakers to be manufactured on audience's product appearance of the acoustic image of any direction on every side.Because product at that time is to rely on analogue technique to make, can not realize complicated reflection sound, so can't reach desired sufficient performance now.
In the modern technologies field,, wherein extensively popularize and what obtain the outstanding identification of tonequality is the AC-3 mode of Dao Er than (dolby) company for the problem that overcomes this kind function has proposed a lot of standard schemes.For example, the film of playing at arenas is handled sound equipment by AC-3 around mode.It is to be coded in track with being called the stereosonic film of AC-3 with 5.1 channel tracks, regenerates after being recorded in cinefilm.
For at family regeneration encoded video software, need carry out decoding processing after, the loud speaker more than 6 or 6 is set, the decoding back is to each loud speaker output.
Above-mentioned Dao Er regenerates and the multichannel mode of making around being originally at the cinema than the AC-3 of company.With audio-frequency signal coding is 5.1 channel bit stream forms, 5.1 channels that are encoded of decoding again are exactly left and right sides loud speaker and several loud speakers rear wall on of decoded signal by left side, right side, the place ahead upside, center and rear that AC-3 is around (perhaps Dao Er is more stereo than AC-3) around the mode of exporting.And, serve as the general home-use software that the basis makes with this cinefilm, because have the track that is encoded equally, can be in the device regeneration of supporting that the AC-3 mode is regenerated.
The video or the audio software of encoding in the AC-3 mode in family regeneration need carry out decoding processing, and the loud speaker more than 6 or 6 is set, and the decoding back is by each loud speaker output.
Adopt the advanced audio system of this AC-3 mode audio frequency to come out now.Suppose in the decoder of this advanced audio can to reach the maximum purpose of reproducing and realize sound field as the former sound of AC-3 advantage in this case except arriving same points around 5 channel signals the channel signals.
Supply along with cheap household audio and video system recently begins, and constructs the home theater that possesses the AC-3 surrounding system within the family and also begins to come back.
Thereupon, within the family also can be as listening audio frequency with AC-3 around sound at the cinema, still, above-mentioned AC-3 might bring burden to the audience around sound according to environment for use.So urgent hope exploitation is selected or broadcast capacity according to the user, the AC-3 of mixing downwards is around the technology of 5.1 channel audio signals of sound.
Summary of the invention
The objective of the invention is the trend according to the user, it is R around 5.1 channel audio data of sound that downward mixing AC-3 is provided, the downward mixer device and the method for the voice data of L voice data.
The objective of the invention is to be achieved through the following technical solutions:
The downward mixer device of voice data: in the time of recovery and outputting audio data, with the audio decoder that the voice data that restores is exported as it is or mixing is downwards exported; Handle the output of above-mentioned audio decoder, the DAC, volume and the tonequality adjusting portion that provide to a plurality of loud speakers; The user interface at the interface that is connected with the user is provided; When the user sends downward mixing request by user interface, provide the control part of downward mixing order to above-mentioned audio decoder.
The downward mixer device of voice data: above-mentioned downward mixing from 5.1 channel audio data to the downward mixing of stereo audio data.
The downward mixer device of voice data: the also above-mentioned downward mixing of command execution when above-mentioned control part is exported the pre-set categories program.
The downward frequency mixing method of voice data: by constituting: confirm whether the user sends the stage of downward mixing request as the next stage; When the user sends above-mentioned downward mixing request, 5.1 channel audio data are converted to the stage of stereo audio data output.
The downward frequency mixing method of voice data: also can carry out when the pre-set categories program is exported in above-mentioned downward mixing.
Effect of the present invention is:
As mentioned above, the present invention is according to user's requirement or program classification, and the voice data of mixing 5.1 channels is exported stereo audio data downwards, has the advantage of various requirement of fully satisfying the user.
Description of drawings
Fig. 1 is the audio output device formation skeleton diagram according to the embodiment of the invention;
Fig. 2 is according to the downward frequency mixing method flow chart of the voice data of the embodiment of the invention.
The symbol description of drawing major part
200: tuner, 202:VSB converter section, 204: audio decoder, 206:DAC, volume and tonequality adjusting portion, 208: amplification portion, 210:5.1 channel loud speaker, 212: control part, 214: reservoir, 216: user interface.
Embodiment
Fig. 1 is that the voice input device that possesses the downward mixer device of audio signal of the present invention constitutes diagrammatic sketch.
Specific channel in the tuning RF signal of tuner (200) provides the IF signal that receives by this specific channel to VSB converter section (202).
Above-mentioned VSB converter section (202) for transmitting stream, provides the IF signal restoring to audio decoder (204).Above-mentioned audio decoder (204) restores above-mentioned transmission stream for voice data, provides to DAC, volume and tonequality adjusting portion (206).Especially above-mentioned audio decoder (204) is the control according to control part (212), 5.1 channel audio data is mixed down into R ', L ' voice data.
The downward mixing of above-mentioned audio decoder (204) forms according to mathematical formulae 1.
[mathematical formulae 1]
In above-mentioned mathematical formulae 1: L (left side), Ls (left side around), R (right around), Rs (right around), C (between two parties) are the voice datas of 5 channels of 5.1 channels, and the audio signal W that remains channel is omitted.
Provide to DAC, volume and tonequality adjusting portion (206) above-mentioned audio decoder (204) output 5.1 channels voice data or by the R ' of the output of mixing downwards, L ' voice data.
Above-mentioned DAC, volume and tonequality adjusting portion (206) when L ' voice data is converted to analog signal, are regulated volume and tonequality with the voice data of above-mentioned 5.1 channels or by the R ' of the output of mixing downwards, provide to amplification portion (208).
The audio signal or the R ' of above-mentioned amplification portion (208) amplification 5.1 channels after the L ' audio signal, offer the audio signal of above-mentioned 5.1 channels the loud speaker (210) of each channel correspondence.And with above-mentioned R ', L ' audio signal offers the L in the loud speaker of 5.1 channels (210), R loud speaker.
Control part (212) is not only controlled above-mentioned voice input device totally.And, according to embodiments of the invention, control above-mentioned audio decoder (204) audio signal of mixing 5.1 channels downwards.
Reservoir (214) is not only controlled various information, also stores the handling procedure of above-mentioned control part (212).
User interface (216) is utilized keyboard or remote controller, connects user and above-mentioned control part (212).
Now, with reference to the running of the above-mentioned downward mixer device of flowchart text of Fig. 2.
Above-mentioned control part (212) confirms whether the user asks downward mixing (300 stage) by user interface (216).When above-mentioned user asked downward mixing, above-mentioned control part (212) control audio decoder (204) was mixed down R ' downwards, L ' voice data (304 stage) with the voice data of 5.1 channels.Above-mentioned audio decoder (204) is mixed down R ' according to the control of above-mentioned control part (212) downwards with 5.1 channel audio data, and L ' voice data is finished the downward mixing of audio frequency of asking according to the user with this.
In addition, even the user does not ask downward mixing, above-mentioned control part (212) confirms whether to export pre-set categories program (302 stage) for downward mixing voice data.
At this, above-mentioned category setting is by user's setting or is preset as acquiescence, also can be decided to be news as above-mentioned classification.
And the program classification of above-mentioned output is to rely on the EPG of digital television broadcasting service to obtain.
If output is for the downward pre-set categories program of the above-mentioned voice data of mixing, above-mentioned control part (212) control audio decoder (204) is mixed down into R ', L ' voice data (304 stage) with the voice data of 5.1 channels.Above-mentioned audio decoder (204) is according to the control of above-mentioned control part (212), and the voice data of 5.1 channels is mixed down into R ', and L ' voice data is finished the downward mixing of audio frequency that is fit to classification with this.
As mentioned above, the present invention can be according to user's requirement or program classification, with the downward mixing output of the voice data of 5.1 channels.
Claims (5)
1. the downward mixer device of voice data is characterized in that: in the time of recovery and outputting audio data, with the audio decoder that the voice data that restores is exported as it is or mixing is downwards exported; Handle the output of above-mentioned audio decoder, the DAC, volume and the tonequality adjusting portion that provide to a plurality of loud speakers; The user interface at the interface that is connected with the user is provided; When the user sends downward mixing request by user interface, provide the control part of downward mixing order to above-mentioned audio decoder.
2. the downward mixer device of voice data as claimed in claim 1 is characterized in that: above-mentioned downward mixing from 5.1 channel audio data to the downward mixing of stereo audio data.
3. the downward mixer device of voice data as claimed in claim 1 is characterized in that: the also above-mentioned downward mixing of command execution when above-mentioned control part is exported the pre-set categories program.
4. the downward frequency mixing method of voice data is characterized in that by constituting as the next stage: confirm whether the user sends the stage of downward mixing request; When the user sends above-mentioned downward mixing request, 5.1 channel audio data are converted to the stage of stereo audio data output.
5. the downward frequency mixing method of voice data as claimed in claim 4 is characterized in that: also can carry out when the pre-set categories program is exported in above-mentioned downward mixing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200510045919 CN1652638A (en) | 2005-02-23 | 2005-02-23 | Apparatus and method for downward mixing of VF data |
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| CN 200510045919 CN1652638A (en) | 2005-02-23 | 2005-02-23 | Apparatus and method for downward mixing of VF data |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102006339A (en) * | 2010-11-22 | 2011-04-06 | 上海南华机电有限公司 | Orthogonal frequency division multiplexing (OFDM) technology-based AC/DC power-line industrial field phone |
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2005
- 2005-02-23 CN CN 200510045919 patent/CN1652638A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102006339A (en) * | 2010-11-22 | 2011-04-06 | 上海南华机电有限公司 | Orthogonal frequency division multiplexing (OFDM) technology-based AC/DC power-line industrial field phone |
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