CN104469231A - Multimedia transmission device and power supply control method thereof - Google Patents
Multimedia transmission device and power supply control method thereof Download PDFInfo
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- CN104469231A CN104469231A CN201310434986.9A CN201310434986A CN104469231A CN 104469231 A CN104469231 A CN 104469231A CN 201310434986 A CN201310434986 A CN 201310434986A CN 104469231 A CN104469231 A CN 104469231A
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Abstract
The invention discloses a multimedia transmission device and power supply control method thereof. The multimedia transmission device comprises at least one video processor, an audio processor and an audio power supply control unit. Each video processor is coupled to a corresponding video transmission port. An enable cable connection signal is generated when an external cable is coupled through the video transmission port. The audio power supply control unit is coupled to the video processor and the audio processor. The audio power supply control unit receives the cable connection signal, and when the cable connection signal is not enabled, the audio power supply control unit turns off the power supply of the audio processor.
Description
Technical field
The invention relates to a kind of Energy control technology of multimedia device, and relate to especially a kind of utilize the annexation of transmission of video port and external cable to determine whether power to apparatus for processing audio multimedia transmission apparatus and power control method.
Background technology
Along with scientific and technological progress, multimedia video transmitting device also increases gradually in the kind of its image transmission port, and popularizing due to network technology, make multimedia video transmitting device increase many application, but also increase power consumption jointly.Such as, multimedia video transmitting device can pass through Video Graphics Array (Video Graphics Array; VGA) terminal, digital visual interface (Digital Visual Interface; DVI) terminal etc. carry out transmission of video picture; By TRS terminal, Sony's Philips Digital interface format (Sony/Philips Digital Interface Format; Etc. S/PDIF) transmission of audio data are carried out; By HDMI (High Definition Multimedia Interface) (High Definition Multimedia Interface; HDMI) transmit picture and voice data simultaneously.
Because each image and audio transmission port all can possess corresponding video processor or image-decoding device; therefore each multimedia video transmitting device often has video processor or the standby and lasting electric consumption of audio process of many groups, but not have comparatively effective mode to carry out the management of power supply to these images, audio process.In addition, current multimedia video transmitting device additionally increases many application functions owing to being connected to world-wide web, but multimedia video transmitting device also correspondingly increases equipment and the network related application of interconnection network, thus improves the power consumption possibility of these multimedia devices.By this, how allowing multimedia video transmitting device can more power saving, be the technical difficulty suffered from present.
Summary of the invention
The invention provides a kind of multimedia transmission apparatus and power control method thereof, utilize the custom of user when using multimedia transmission apparatus, namely, utilize the annexation of the transmission of video port in multimedia transmission apparatus and external cable to determine whether powering to audio process, use and reach power saving effect.
The present invention proposes a kind of multimedia transmission apparatus, and it comprises at least one video processor, audio process and audio frequency power control unit.Each video processor produces enable cable connection signal when being coupled at least one corresponding transmission of video port respectively to couple external cable.Each video processor, when being coupled to external cable by each transmission of video port, just can produce enable cable connection signal.Audio frequency power control unit is coupled to described video processor and described audio process.Audio frequency power control unit receives described cable connection signal, and when described cable connection signal does not have enable, audio frequency power control unit closes the power supply of described audio process.
In one embodiment of this invention, described video processor is in order to process and to export the image part of multimedia series flow, and described audio process is in order to process and to export the audio-frequency unit of multimedia series flow.
In one embodiment of this invention, described video processor is the digital video analog converter of process RGB color coding, YCbCr color coding, YUV color coding or digital visual interface (DVI).
In one embodiment of this invention, above-mentioned multimedia transmission apparatus more comprises CPU.CPU is in order to provide audio frequency enable signal to described audio frequency power control unit.Whether audio frequency power control unit closes the power supply of described audio process according to described audio frequency enable signal and described cable connection signal with decision.
In one embodiment of this invention, above-mentioned audio frequency power control unit comprises one and door.Described cable connection signal and described audio frequency enable signal is received respectively with the input of door.Describedly produce the first audio activation signal with the output of door.Audio process determines whether start self according to described first audio activation signal.
In one embodiment of this invention, above-mentioned CPU produces function select signal to this audio frequency power control unit, in order to determine whether enable described audio frequency power control unit.Described audio frequency power control unit more comprise one or.Or the function select signal that the input of door receives described first audio activation signal and produces from CPU.Output that is described or door produces the second audio activation signal.Described audio process determines whether start self according to described second audio activation signal.
Another viewpoint, the present invention proposes a kind of power control method of multimedia transmission apparatus, and described multimedia transmission apparatus comprises at least one video processor and audio process.Power control method comprises the following steps.Judge whether described video processor couples external cable by described transmission of video port, to produce enable cable connection signal.When described cable connection signal does not have enable, close the power supply of described audio process.All the other implementation details of the power control method of this multimedia transmission apparatus please refer to above-mentioned explanation.
Based on above-mentioned, the embodiment of the present invention utilizes the custom of multimedia transmission apparatus when being used, and judges whether to power to apparatus for processing audio by the annexation of the transmission of video port in multimedia transmission apparatus and external cable.That is, user, when not using the transmission of video port of multimedia transmission apparatus to carry out transmission of video picture, also can not use the audio process of this multimedia transmission apparatus to carry out encoding and decoding to voice data usually.Therefore, when the transmission of video port in multimedia transmission apparatus is not interconnected with external cable, represent that user does not use video processor in this multimedia transmission apparatus and audio process, the multimedia transmission apparatus of the embodiment of the present invention is just stopped power supply to audio process, uses and reaches power saving effect.
For above-mentioned feature and advantage of the present invention can be become apparent, special embodiment below, and coordinate institute's accompanying drawings to be described in detail below.
Accompanying drawing explanation
Fig. 1 is a kind of calcspar of multimedia transmission apparatus.
Fig. 2 meets the calcspar that the embodiment of the present invention illustrates multimedia transmission apparatus.
Fig. 3 meets the flow chart that the embodiment of the present invention illustrates the power control method of multimedia transmission apparatus.
Fig. 4 meets the first calcspar that the embodiment of the present invention illustrates multimedia transmission apparatus sound intermediate frequency power control unit.
Fig. 5 meets the second calcspar that the embodiment of the present invention illustrates multimedia transmission apparatus sound intermediate frequency power control unit.
Fig. 6 meets third party's block figure that the embodiment of the present invention illustrates multimedia transmission apparatus sound intermediate frequency power control unit.
Fig. 7 meets the square figure that the embodiment of the present invention illustrates multimedia transmission apparatus sound intermediate frequency power control unit.
Fig. 8 meets the 5th calcspar that the embodiment of the present invention illustrates multimedia transmission apparatus sound intermediate frequency power control unit.
Drawing reference numeral illustrates:
100: multimedia transmission apparatus
110,210: video processor
112,212,212-1 ~ 212-4: transmission of video port
120,220: audio process
122,222,222-1 ~ 222-2: audio transmission port
130,230: CPU
132: enable signal
140: television set
200: multimedia device
250: audio frequency power control unit
S310 ~ S340: step
410: switch element
510: with door
520: or door
APS: audio-frequency electric source signal
AEN: audio frequency enable signal
S1: the first audio activation signal
S2: the second audio activation signal
CCS, Y-CCS, CVBS-CCS, VGA-CCS, DVI-CCS: cable connection signal
Embodiment
Fig. 1 is a kind of calcspar of multimedia transmission apparatus 100.Multimedia transmission apparatus 100 can be box etc. on video compact disc player, digital television.The present embodiment using box on digital television as the main citing of multimedia transmission apparatus 100, but is not limited in this.Multimedia transmission apparatus 100 is coupled to display device and audio-frequence player device by transmission of video port one 12 and/or audio transmission port one 22, such as television set 140, uses and is carried out decoding by multimedia series flow and be played in television set 140.In section Example, multimedia transmission apparatus 100 also receives by transmission of video port one 12 and/or audio transmission port one 22 the video/audio crossfire that other equipment transmit.That is, multimedia transmission apparatus 100 is not limited in and multimedia series flow is transferred to other devices, also can receive these multimedia series flows to carry out the data transmission between device.
Multimedia transmission apparatus 100 comprises one or more video processor 110, one or more audio process 120 and CPU 130.Multimedia transmission apparatus 100 is in order to process and to export the image part of multimedia series flow.Multimedia transmission apparatus 100 can possess various video transmit port 112, and often kind of different transmission of video port one 12 represents different video transmission interface respectively, and each video processor 110 is coupled to corresponding transmission of video port one 12 respectively.Video processor 110 is such as the digital analog converter utilizing RGB color coding, YCbCr color coding and/or the video data such as the color-coded Video Graphics Array of YUV (VGA) video engine (engine), digital visual interface (DVI) video engine.
Audio process 120 can be the audio engine being exclusively used in processing audio data, can by digital modulation device (such as, SDM(sigma-delta modulation)) modulator), digital audio analog converter (digital-to-analogconverter; DAC) and audio frequency simulation amplifier formed.That is, audio process 120 is in order to process and to export the audio-frequency unit of multimedia series flow.This one or more audio process 120 can be the audio engine adopting different special audio coding category respectively.Such as, audio process 120 can adopt AC97, Intel's high definition audio (Intel High Definition Audio; IHD) or SACD(Super Audio CD) etc. audio decoding techniques.Each audio process 120 couples different audio transmission port ones 22 respectively.
CPU 130 by the operation of user, can utilize enable signal 132 manually to distinguish enable/disable video processor 110 and audio process 120, allows user can carry out power saving by manual mode.
Due in the custom of user, if when user utilizes the video processor 110 of this multimedia transmission apparatus and transmission of video port one 12 to transmit the video section of also play multimedia crossfire, usually the audio process 120 of multimedia transmission apparatus and audio transmission port one 22 also can be utilized together to transmit and the audio-frequency unit of play multimedia crossfire, use and obtain vision and dual enjoyment acoustically.But, comparatively speaking, when user does not utilize the video processor 110 of this multimedia transmission apparatus 100 and transmission of video port one 12 to transmit the video section of also play multimedia crossfire, so the audio process 120 of multimedia transmission apparatus 100 usually also can not be used alone but be in holding state.By this, the transmission of video port one 12 in embodiment of the present invention facility multimedia transmission apparatus 100 determines whether powering to audio process 120 with the annexation of external cable, uses and reaches power saving effect.In other words, if when the external cable that detection transmission of video port one 12 is not connected to television set 140 connects, represent that audio process 120 also can not be used usually, just can by the power-off of audio process 120 to save power supply.Below specifically the embodiment of the present invention will be described.
Fig. 2 meets the calcspar that the embodiment of the present invention illustrates multimedia transmission apparatus 200.The applied environment of multimedia transmission apparatus 200, video processor 210, audio process 220 and central processing unit 230 is all similar to the element of same names in Fig. 1, does not repeat them here.Multimedia transmission apparatus 200, except comprising at least one video processor 210 and audio process 220, more comprises audio frequency power control unit 250.Audio frequency power control unit 250 is coupled to video processor 210 and audio process 220.Audio process 220 possesses audio transmission port 222.
Fig. 3 meets the flow chart that the embodiment of the present invention illustrates the power control method of multimedia transmission apparatus 200.Referring to Fig. 2 and Fig. 3, use the detailed description embodiment of the present invention.In step S310, user starts multimedia device 200.By each transmission of video port 212, each video processor 210 can judge whether that external cable (such as, being connected to the cable of television set 140) inserts, use and produce enable cable connection signal CCS.When transmission of video port one 10 have to be coupled by external cable and mutually to transmit video streaming time, video processor 210 just can make cable connection signal CCS enable.Relatively, when transmission of video port one 10 is not coupled by external cable, video processor 210 just can make cable connection signal CCS forbidden energy.In the present embodiment, video processor 210 can be set up for above-mentioned functions the cable being connected to transmission of video port 212 especially and connect sensor, thus allows this cable connect sensor generation cable connection signal CCS.
In step S320, audio frequency power control unit 250 receives cable connection signal CCS, and judges whether video processor 210 couples external cable by transmission of video port 212 according to this cable connection signal CCS.In other words, audio frequency power control unit 250 can judge whether the power supply of closing audio process 220 according to this cable connection signal CCS.What illustrate is, the embodiment of the present invention utilizes user to be usually accustomed to, when the video processor 110 of multimedia transmission apparatus is not used, when namely transmission of video port one 12 does not couple external cable, cable connection signal CCS now should be disabled state (in other words, cable connection signal CCS does not have enable), just step S330 is entered from step S320, audio frequency power control unit 250 is forbidden energy audio-frequency electric source signal A PS according to cable connection signal CCS, to close the power supply of audio process 220, thus reach the effect of power saving.
If cable connection signal CCS is in enabled state always, that is, transmission of video port 212 is interconnected with external cable always, represents that user still has and utilizes the video processor 210 of multimedia device 200 to carry out the transmission of multimedia series flow.Now, according to the general custom of user, audio process 120 also should need to continue running.Therefore, just enter step S340 from step S320, audio frequency power control unit 250 continues enable audio-frequency electric source signal A PS, to continue the power supply providing audio process 220.
The multimedia transmission apparatus 200 of the present embodiment more comprises CPU 230.CPU 230, in order to provide audio frequency enable signal AEN to audio frequency power control unit 250, is used decision and whether is enabled application function in audio frequency power control unit 250.In other words, audio frequency power control unit 250 will determine whether the power supply of closing audio process 220 according to audio frequency enable signal AEN and cable connection signal CCS.In the present embodiment, when audio frequency enable signal AEN is enable, represents that CPU wishes to close the arbitration functions of audio frequency power control unit 250, and force state audio process 220 being set in constrained feed.
Following this explanation of cooperation is each graphicly meets the various detailed circuit structures of the audio frequency power control unit 250 of the embodiment of the present invention to disclose, application the present embodiment person should utilize these circuit frameworks come appropriate carry out circuit adjustment, combination and extension.Fig. 4 meets the first calcspar that the embodiment of the present invention illustrates multimedia transmission apparatus 200 sound intermediate frequency power control unit 250.In Fig. 4, audio frequency power control unit 250 utilizes switch element 410 to realize.Such as, the audio frequency enable signal AEN provided for enable and CPU 230 as cable connection signal CCS is also for time enable, now transmission of video port 212 should be connected with external cable, therefore audio process 410 can because enable audio-frequency electric source signal A PS and continue power by multimedia transmission apparatus 200.
Fig. 5 meets the second calcspar that the embodiment of the present invention illustrates multimedia transmission apparatus 200 sound intermediate frequency power control unit 250.The Video processing of Fig. 5 possesses two kinds of different transmission of video ports, is respectively to transmit Composite Video Baseband Signal (Composite Video Broadcast Signal; CVBS) transmission of video port 212-1 and in order to transmit YPbPr(or to be called YCbCr) three transmission of video port 212-2 of aberration terminal.By this, video processor 210 just can produce corresponding transmission of video port 212-1 and respectively for the cable connection signal CVBS-CCS of Composite Video Baseband Signal (CVBS) and the cable connection signal Y-CCS of corresponding transmission of video port 212-2.In other words, when transmission of video port 212-1 has connection external cable, cable connection signal CVBS-CCS just can be enable; When three transmission of video port 212-2 all have connection external cable, cable connection signal Y-CCS just can be enable.
When CPU 230 only has generation audio frequency enable signal AEN, the audio frequency power control unit of Fig. 5 can only include and door (AND GATE) 510.Cable connection signal Y-CCS, CVBS-CCS and audio frequency enable signal AEN is received respectively with the input of door 510.By this, when cable connection signal Y-CCS, CVBS-CCS and audio frequency enable signal AEN are all enable, just represent must continued power to audio process 220, therefore the first audio activation signal S1 is just enable, and audio process 220 determines whether start self according to the first audio activation signal S1.In addition, audio process 200 comprises left audio transmit port 222-1 and right audio channel transmit port 222-2.
Special instruction, CPU 230 can produce function select signal SEL to audio frequency power control unit 250, in order to determine whether enable audio frequency power control unit 250.In now, the audio frequency power control unit of Fig. 5 except with door 510 except can also comprise one or (an OR GATE) 520.The first audio activation signal S1 is produced with the output of door 510.Or the function select signal SEL that the input of door 520 receives the first audio activation signal S1 and produces from CPU 230.Or the output of door 520 produces the second audio activation signal S2.By this, when function select signal SEL is enable, no matter the first audio activation signal S1 is forbidden energy or enable, and the second audio activation signal S2 is all enable, makes audio process 220 all can maintain starting state.Relatively, when function select signal SEL is forbidden energy, the second audio activation signal S2 just can followed by the first audio activation signal S1 and change, and uses the power supply supply status determining audio process 220.
Fig. 6 meets third party's block figure that the embodiment of the present invention illustrates multimedia transmission apparatus 200 sound intermediate frequency power control unit 250.Be compared to Fig. 5 and Fig. 6, the video processor 210 of Fig. 6 can produce corresponding transmission of video port 212-1 and for the cable connection signal CVBS-CCS of Composite Video Baseband Signal (CVBS).Cable connection signal CVBS-CCS and audio frequency enable signal AEN is received with the input of door 510.Correlation technique discloses and then please refer to above-described embodiment.
Fig. 7 meets the square figure that the embodiment of the present invention illustrates multimedia transmission apparatus 200 sound intermediate frequency power control unit 250.Be compared to Fig. 5 and Fig. 7, the video processor 210 of Fig. 7 utilizes VGA terminal to transmit image data, therefore possesses the transmission of video port 212-3 that vertical synchronizing signal (Hsync), horizontal-drive signal (Vsync), red signal light (R), green optical signal (G) and blue light signals (B) form.Therefore, video processor 210 just can produce the cable connection signal VGA-CCS of corresponding transmission of video port 212-3.Cable connection signal VGA-CCS and audio frequency enable signal AEN is received with the input of door 510.Correlation technique discloses and then please refer to above-described embodiment.
Fig. 8 meets the 5th calcspar that the embodiment of the present invention illustrates multimedia transmission apparatus 200 sound intermediate frequency power control unit 250.Be compared to Fig. 5 and Fig. 8, the video processor 210 of Fig. 8 utilizes DVI terminal to transmit image data, therefore possesses transmission of video port 212-4(also referred to as, DVI interface).Therefore, video processor 210 just can produce the cable connection signal DVI-CCS of corresponding transmission of video port 212-4.Cable connection signal DVI-CCS and audio frequency enable signal AEN is received with the input of door 510.Correlation technique discloses and then please refer to above-described embodiment.
In sum, the embodiment of the present invention utilizes the custom of multimedia transmission apparatus when being used, and judges whether to power to apparatus for processing audio by the annexation of the transmission of video port in multimedia transmission apparatus and external cable.That is, user, when not using the transmission of video port of multimedia transmission apparatus to carry out transmission of video picture, also can not use the audio process of this multimedia transmission apparatus to carry out encoding and decoding to voice data usually.Therefore, when the transmission of video port in multimedia transmission apparatus is not interconnected with external cable, represent that user does not use video processor in this multimedia transmission apparatus and audio process, the multimedia transmission apparatus of the embodiment of the present invention is just stopped power supply to audio process, uses and reaches power saving effect.
Although the present invention discloses as above with embodiment; so itself and be not used to limit the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when doing a little change and retouching, therefore protection scope of the present invention is when being as the criterion depending on the right person of defining.
Claims (10)
1. a multimedia transmission apparatus, is characterized in that, comprising:
At least one video processor, produces enable cable connection signal when being coupled at least one corresponding transmission of video port respectively to couple external cable;
One audio process; And
One audio frequency power control unit, be coupled at least one video processor described and described audio process, described audio frequency power control unit receives described cable connection signal, and when described cable connection signal does not have enable, described audio frequency power control unit closes the power supply of described audio process.
2. the multimedia transmission apparatus as described in claim the 1, it is characterized in that, at least one video processor described is in order to process and to export the image part of multimedia series flow, and described audio process is in order to process and to export the audio-frequency unit of multimedia series flow.
3. the multimedia transmission apparatus as described in claim the 1, is characterized in that, at least one video processor described is the digital video analog converter of process RGB color coding, YCbCr color coding, YUV color coding or digital visual interface.
4. the multimedia transmission apparatus as described in claim the 1, it is characterized in that, more comprise a CPU, in order to provide audio frequency enable signal to described audio frequency power control unit, whether described audio frequency power control unit closes the power supply of described audio process according to described audio frequency enable signal and described cable connection signal with decision.
5. the multimedia transmission apparatus as described in claim the 4, is characterized in that, described audio frequency power control unit comprises:
With door, its input receives described cable connection signal and described audio frequency enable signal respectively, and describedly produces the first audio activation signal with the output of door, and wherein said audio process determines whether start according to described first audio activation signal.
6. the multimedia transmission apparatus as described in claim the 5, is characterized in that, described CPU produces function select signal to described audio frequency power control unit, in order to determine whether enable described audio frequency power control unit, and
Audio frequency power control unit more comprises:
Or door, the function select signal that its input receives described first audio activation signal and produces from described CPU, and output that is described or door produces the second audio activation signal, and wherein said audio process determines whether start according to described second audio activation signal.
7. a power control method for multimedia transmission apparatus, is characterized in that, described multimedia transmission apparatus comprises at least one video processor and an audio process, and described power control method comprises:
Judge whether at least one video processor described couples external cable by transmission of video port, to produce enable cable connection signal; And
When described cable connection signal does not have enable, close the power supply of described audio process.
8. the power control method as described in claim the 7, is characterized in that, at least one video processor described is in order to process and to export the image part of multimedia series flow, and described audio process is in order to process and to export the audio-frequency unit of multimedia series flow.
9. the power control method as described in claim the 7, is characterized in that, at least one video processor described is the digital video analog converter of process RGB color coding, YCbCr color coding, YUV color coding or digital visual interface.
10. the power control method as described in claim the 7, is characterized in that, described multimedia transmission apparatus more comprises the CPU providing an audio frequency enable signal, and
Described power control method more comprises:
The power supply of described audio process whether is closed with decision according to described audio frequency enable signal and described cable connection signal.
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| CN201310434986.9A CN104469231A (en) | 2013-09-22 | 2013-09-22 | Multimedia transmission device and power supply control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310434986.9A CN104469231A (en) | 2013-09-22 | 2013-09-22 | Multimedia transmission device and power supply control method thereof |
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| CN104469231A true CN104469231A (en) | 2015-03-25 |
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| CN201310434986.9A Pending CN104469231A (en) | 2013-09-22 | 2013-09-22 | Multimedia transmission device and power supply control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106201926A (en) * | 2016-06-30 | 2016-12-07 | 联想(北京)有限公司 | A kind of control method and electronic equipment |
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