CN201066879Y - Audio output device for STB/video player - Google Patents
Audio output device for STB/video player Download PDFInfo
- Publication number
- CN201066879Y CN201066879Y CNU2007201478213U CN200720147821U CN201066879Y CN 201066879 Y CN201066879 Y CN 201066879Y CN U2007201478213 U CNU2007201478213 U CN U2007201478213U CN 200720147821 U CN200720147821 U CN 200720147821U CN 201066879 Y CN201066879 Y CN 201066879Y
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- audio
- top box
- audio signal
- electronic switch
- output device
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Abstract
The utility model discloses an audio output device of a set-top box or a disc player and relates to a multimedia playing system, which is designed to solve the problem that the an existing set-top box or disc player can not play audio information independently. The audio output device of the set-top box or the disc player has an audio signal output terminal and a bidirectional electronic switch, the output terminal of which is connected to the audio signal output terminal. The bidirectional electronic switch is provided with two output terminals, to which audio signals are switched. One of the output terminals is connected with a loudspeaker. Users can communicate the audio signals to the inner arranged loudspeaker by the bidirectional electronic switch, and the audio signals are played by the inner arranged loudspeaker. The utility model can be used in both set-top boxes or disc players and other electronic products for reading multimedia information.
Description
Technical field
The utility model relates to multimedia play system, particularly the output device of multimedia play system sound intermediate frequency signal.
Background technology
Present television broadcasting signal just by analog signal to the digital signal transition, and the existing television set that adopts analog signal all needs to be equipped with set-top box and just can watch digital television program, set-top box is used for receiving TV programme and the digital synthesis information of utilizing digital signal to propagate, and convert the digital signal that receives to analog signal, then analog signal is sent to television set.The user of analog signal television set only need be equipped with a set-top box, and need not change television set, just can enjoy all services that Digital Television provides.
Being connected as shown in Figure 1 of existing television set and set-top box, the audio signal (comprising L channel audio A udioL and right audio channel Audio R) and the vision signal (Video) of set-top box output output to television set, and by television set audio signal and vision signal are play.
When the user receives all kinds of audio broadcasting by set-top box, audio output device audio plays broadcasting by television set, and do not need to utilize the video of television set to export, but owing to must turn on the audio/video player system of television set when turning on the audio frequency broadcast system of television set, and the power consumption of the audio/video player system of television set is sizable, can cause the serious waste on the energy, also can have influence on the useful life of television set simultaneously.
Equally, when using video disc player (as: DVD player, VCD machine) to play CD, all need external picture output device and audio output apparatus (generally all realizing) by the external tv machine, but the user does not need to watch video information sometimes, only listen to acoustic information, for example: in CD, have only audio-frequency informations such as music, cross-talk, or when listening Beijing opera, the someone likes closing image, a listening.If at this time also need to turn on television set (or other picture output devices), will cause the unnecessary wasting of resources.
The utility model content
The utility model provides a kind of audio output device of set-top box/video disc player, makes set-top box/video disc player not need external other audio frequency and video output equipments just can playing audio signal.
For achieving the above object, the utility model adopts following technical scheme: the audio output device of this set-top box/video disc player comprises audio signal output end, also comprises bidirectional electronic switch, and the input of described bidirectional electronic switch is connected to audio signal output end; Described bidirectional electronic switch is provided with two outputs, and audio signal is switched between these two outputs, and one of them output is connected with loud speaker.
Because existing set-top box/video disc player does not have boombox, must be by external audio frequency and video output equipment (for example television set) signal that just can play sound, after adopting the utility model, the user can be switched to boombox with audio signal by bidirectional electronic switch, by built-in loudspeaker plays audio signal.Thus, when the user need play sound signal by set-top box/video disc player, then can audio signal output be arrived boombox, and need not turn on television set in addition, avoid unnecessary energy waste by electronic switch; When the user needs while playing audio signal and vision signal, can play when realizing audio signal and vision signal at another output termination audio frequency and video output equipments (as television set) of bidirectional electronic switch.
Description of drawings
Fig. 1 is the connection diagram of existing set-top box and television set;
Fig. 2 is the schematic diagram of power amplification circuit in the audio output device of the utility model set-top box/video disc player;
Fig. 3 is the schematic diagram of the audio output device of the utility model set-top box/video disc player.
Embodiment
The audio output device of the utility model set-top box/video disc player audio signal output is arrived this audio frequency broadcast system and television set, and the control audio signal switches between built-in audio frequency broadcast system and television set by a built-in audio frequency broadcast system.When only needing playing audio signal, can enable built-in audio frequency broadcast system; When needs while playing audio signal and vision signal, then can enable television set.
Elaborate below in conjunction with the audio output device of accompanying drawing to the utility model set-top box/video disc player.
As shown in Figure 2, the audio output part branch of the audio output device of the utility model set-top box/video disc player comprises audio signal output end (Audio R), also comprise bidirectional electronic switch, the input of described bidirectional electronic switch is connected to audio signal output end (Audio R); Described bidirectional electronic switch is provided with two outputs, and audio signal is switched between these two outputs, and one of them output is connected with loud speaker.
Because the audio output device of the utility model set-top box/video disc player is built-in with loud speaker, makes set-top box/video disc player have the function of playing audio signal, and pass through the output of bidirectional electronic switch control audio signal.Existing set-top box/video disc player does not have boombox, must be by external audio frequency and video output equipment (for example television set) signal that just can play sound, after adopting the utility model, the user can be switched to boombox with audio signal by bidirectional electronic switch, by built-in loudspeaker plays audio signal, avoided unnecessary energy waste.
In order to export bigger volume, be provided with power amplification circuit between the output of described bidirectional electronic switch and the loud speaker, this power amplification circuit exports loud speaker to after audio signal is amplified.Because power amplification circuit can be regulated magnification ratio, so just can regulate the volume of output.
Power amplification circuit in the utility model can adopt audio amplifier circuit commonly used, for example the audio amplifier circuit of model such as AN7114, AN7115.Wherein the audio amplifier circuit of AN7114 model as shown in Figure 3, at the load resistance R of input voltage Vcc=6.0V, total harmonic distortion THD=10%, loud speaker
LUnder=8 Ω conditions, power output can reach 0.6W, and noise output has only 3mW.The running parameter of the audio amplifier circuit of AN7114 model is as follows: limit input voltage Vcc (max)=11V, limit dissipation power (not being with radiator) is 1.2W, the condition limit inferior dissipation power of band radiator is 2.25W, and normal working temperature is-20 ℃ to 70 ℃.
In order to export the sound of better quality, as shown in Figure 2, be connected with emitter follower between the input of described audio signal output end and bidirectional electronic switch.Because emitter follower can insulating noise, has stronger antijamming capability, thereby noise is few when having guaranteed voice output, and sound quality is higher.
Audio signal recited above comprises left channel audio signal or right channel audio signal, can export one of left channel audio signal and right channel audio signal in the built-in loud speaker in the utility model, if the utility model is provided with two covers in set-top box/video disc player, then left channel audio signal and right channel audio signal can be exported simultaneously.
Be example with right channel audio signal (the Audio R among Fig. 2) below, concrete connection on the circuit of the present utility model is described, as shown in Figure 2, after right channel audio signal arrives Audio R terminal, be divided into two-way output by bidirectional electronic switch, an output of bidirectional electronic switch is received on the power amplifier, and the audio signal after will amplifying is passed through a built-in loud speaker voice output, another output of bidirectional electronic switch is connected with the audio frequency and video output equipment, and passes through the audio frequency and video output equipment voice output.
The audio output device of the utility model set-top box/video disc player switches in described two-way output by bidirectional electronic switch control audio signal, in actual applications, can control the switching of bidirectional electronic switch by the CPU in the controller.For example: the user can select the outgoing route of audio signal by remote controller according to individual demand, a switching key can also be set on set-top box/video disc player, by the state of this switching key control break internal controller, thereby realize the switching in audio signal output path.
The utility model not only can be used for set-top box/video disc player, can also be used in other electronic product that reads multimedia messages, for example: the CD-ROM drive in the personal computer.
The above; it only is embodiment of the present utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; can expect easily changing or replacing, all should be encompassed within the protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of claim.
Claims (7)
1. the audio output device of a set-top box/video disc player comprises audio signal output end, it is characterized in that also comprising bidirectional electronic switch, and the input of described bidirectional electronic switch is connected to audio signal output end; Described bidirectional electronic switch is provided with two outputs, and audio signal is switched between these two outputs, and one of them output is connected with loud speaker.
2. according to the audio output device of the described set-top box/video disc player of claim 1, it is characterized in that, be provided with power amplification circuit between the output of described bidirectional electronic switch and the loud speaker, this power amplification circuit exports loud speaker to after audio signal is amplified.
3. according to the audio output device of the described set-top box/video disc player of claim 1, it is characterized in that, be connected with emitter follower between described audio signal output end and the bidirectional electronic switch input.
4. according to the audio output device of claim 1 or 2 described set-top box/video disc players, it is characterized in that another output of described bidirectional electronic switch connects the audio frequency and video output equipment.
5. according to the audio output device of the described set-top box/video disc player of claim 4, it is characterized in that, also comprise controller, the switching of this controller control bidirectional electronic switch.
6. according to the audio output device of the described set-top box/video disc player of claim 5, it is characterized in that described controller is a remote controller.
7. according to the audio output device of the described set-top box/video disc player of claim 1, it is characterized in that described audio signal is left channel audio signal or right channel audio signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201478213U CN201066879Y (en) | 2007-05-31 | 2007-05-31 | Audio output device for STB/video player |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201478213U CN201066879Y (en) | 2007-05-31 | 2007-05-31 | Audio output device for STB/video player |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201066879Y true CN201066879Y (en) | 2008-05-28 |
Family
ID=39484064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201478213U Expired - Lifetime CN201066879Y (en) | 2007-05-31 | 2007-05-31 | Audio output device for STB/video player |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201066879Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101742180B (en) * | 2008-11-10 | 2012-06-27 | 康佳集团股份有限公司 | Circuit for realizing two-way sound transmission on same port |
-
2007
- 2007-05-31 CN CNU2007201478213U patent/CN201066879Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101742180B (en) * | 2008-11-10 | 2012-06-27 | 康佳集团股份有限公司 | Circuit for realizing two-way sound transmission on same port |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Qingdao Jiaonan Haier Electronic Co., Ltd. Assignor: Haier Group Company Qingdao Haier Electronics Co., Ltd. Contract record no.: 2010370000297 Denomination of utility model: Audio output device for STB/video player Granted publication date: 20080528 License type: Exclusive License Record date: 20100521 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151116 Address after: 266101 Haier Industrial Park, Haier Road, hi tech park, Shandong, Qingdao, China Patentee after: haier group corporation Patentee after: Qingdao Haier Electric Appliance Co., Ltd. Patentee after: QINGDAO HAIER MULTI-MEDIA CO., LTD. Address before: 266101 Haier Industrial Park, Haier Road, hi tech park, Shandong, Qingdao, China Patentee before: haier group corporation Patentee before: Qingdao Haier Electric Appliance Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080528 |