CN101764919A - Set-top box and method for regulating sound volume difference between television channels - Google Patents
Set-top box and method for regulating sound volume difference between television channels Download PDFInfo
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- CN101764919A CN101764919A CN200910214487A CN200910214487A CN101764919A CN 101764919 A CN101764919 A CN 101764919A CN 200910214487 A CN200910214487 A CN 200910214487A CN 200910214487 A CN200910214487 A CN 200910214487A CN 101764919 A CN101764919 A CN 101764919A
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Abstract
The invention relates to a set-top box, which comprises a main controller, a memory, a network interface module, a demodulation multiplexer and an output interface module, wherein the memory is connected with the main controller, the network interface module is connected with the demodulation multiplexer through signals, one path of the demodulation multiplexer transfers video signals to the output interface module through a video decoder and an analog encoder, and the other path of the demodulation multiplexer transfers audio signals to the output interface module through an audio decoder and a D/A converter. The invention is characterized in that an audio level comparator is arranged between the audio decoder and the D/A converter, an audio level regulation module with the regulation effect on the audio signals is arranged on the main controller, and the audio level comparator is in interactive connection with the main controller through the audio level regulation module. The invention is suitable for the configured use with a television, so audio signals of different television channels can maintain the consistent signal magnitude after the balance regulation by an audio balancing device, the sound volume difference between the television channels can be overcome, and the influence on the sleeping of family members of users by television channel changing at night can be avoided.
Description
Technical field
The present invention relates to the TV set-top box technical field, be specifically related to a kind of set-top box and the control method thereof that can regulate sound volume difference between television channels.
Background technology
Television set is the electrical equipment of family's indispensability, and television set also can bring people various knowledge when fully enriching people's free life.Along with social development, television set has been people's recreation and amusement, has obtained one of important tool of information, and between night or recess, television set is closely being accompanied people especially.But television set exists the problem of different sound volume difference between television channels at present, this is to cause the program sound of television for play output to vary in size because the sound in each channel program source varies in size, the user need frequently regulate volume according to the program sound size of each channel and make it reach the suitable volume level, and operation is very loaded down with trivial details also inconvenient like this.The problem of different sound volume difference between television channels is more apparent outstanding when night, the late into the night after for example the layman go to bed, when changing channel, the user may go to bed owing to the channel program sound after changing influences the household greatly, this just uses television set to bring inconvenience to people night, and also may make the user produce a feeling to change has unhappy sense to program.Current many television sets dispose set-top box, program source is broadcasted by television set after set-top box receives again, but existing set-top box does not solve the function of different sound volume difference between television channels problems, so the television set of configuration machine top box can not overcome the adjusting sound volume difference between television channels automatically.
Summary of the invention
Technical problem to be solved by this invention provides a kind of set-top box that can regulate sound volume difference between television channels, makes the TV function that disposes this set-top box overcome the problem that volume differs between the television channel.Provide this set-top box to regulate the method for sound volume difference between television channels simultaneously.
For solving the problems of the technologies described above, the technical scheme that the present invention realizes is: a kind of set-top box that can regulate sound volume difference between television channels, comprise master controller and the memory that is connected with master controller, Network Interface Module, demodulation multiplexer and output interface module, Network Interface Module is connected with the demodulation multiplexer signal, demodulation multiplexer is leaded up to Video Decoder, analog encoder is carried vision signal to output interface module, audio decoder is passed through on another road, D/A converter is carried audio signal to output interface module, be provided with the audio level comparator between described audio decoder and the D/A converter, master controller is provided with the audio level adjusting module that audio signal is played corrective action, and the audio level comparator is connected with master controller alternately by the audio level adjusting module.
The method that this set-top box is regulated sound volume difference between television channels may further comprise the steps:
One, Network Interface Module receives current channel digital video-audio signal and transports to demodulation multiplexer, the vision signal of demodulation multiplexer after with descrambling carried to output interface module by Video Decoder, analog encoder, the audio signal behind the descrambling is delivered to audio decoder decodes;
Two, be input to audio level comparator one input as the audio level standard value from the current channel audio signal behind the audio decoder decode;
Three, after the audio level comparator receives from the switching of audio decoder during the channel audio signal, the audio signal of switching back channel is input to another input of audio level comparator and the audio level standard value compares, and calculates audio-frequency electric adjustment Δ V;
Four, master controller obtains audio-frequency electric adjustment Δ V:
When Δ V＞0, the audio signal of channel was turned down to equating with the audio level standard value after main controller controls audio level adjusting module will switch, and channel audio signal after the switching after turning down is transported to D/A converter;
When Δ V＜0, the audio signal accent that main controller controls audio level adjusting module will switch the back channel is big to equating that with the audio level standard value audio level of channel is transported to D/A converter after the switching after accent is big;
As Δ V=0, main controller controls audio level adjusting module is not adjusted the audio level that switches the back channel, and the audio level that directly will switch the back channel is transported to D/A converter.
The advantage that the present invention compared with prior art has is: be provided with the audio level comparator between audio decoder and the D/A converter, and master controller is provided with the audio level adjusting module that audio signal is played corrective action, audio signal all equates with the audio level standard value of level ratio than module settings after the balanced adjusting of audio level adjusting module behind the switching channels of audio decoder output, this just makes audio signal signal amplitude after the balanced adjusting of audio balance device of different television channels be consistent, and overcomes sound volume difference between television channels.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
Technical solution of the present invention is described in further detail by embodiment below in conjunction with accompanying drawing:
Referring to Fig. 1, the configuration of set-top box disclosed by the invention and television set is used, and the adjustment by this set-top box can overcome sound volume difference between television channels, and the television for play volume does not change when making user's switching TV channel.The present invention is a kind of set-top box that can regulate sound volume difference between television channels, comprise master controller 1 and the memory 3 that is connected with master controller, Network Interface Module 20, demodulation multiplexer 21 and output interface module 27, Network Interface Module is connected with the demodulation multiplexer signal, demodulation multiplexer is leaded up to Video Decoder 23, analog encoder 24 is carried vision signal to output interface module, another road is by audio decoder 25, D/A converter 26 is carried audio signal to output interface module, be provided with audio level comparator 22 between audio decoder and the D/A converter, master controller is provided with the audio level adjusting module that audio signal is played corrective action, and the audio level comparator is connected with master controller alternately by the audio level adjusting module.
Operation principle of the present invention is: digital television signal enters set-top box by Network Interface Module 20 and separates and be in harmonious proportion channel-decoding and handle to demodulation multiplexer 21 output MPEG-2 MPTS data, and demodulation multiplexer 21 is extracted a program of having packed out and looked audio frequency and flow the PES data substantially and carry out descrambling and export the video/audio signal of descrambling from the mpeg 2 transport stream data.The vision signal of demodulation multiplexer output enters Video Decoder 23 taking-up MPEG-2 video datas and to outputing to analog encoder 24 after its decoding, is encoded into analog video signal and exports through output interface module, and deliver to television set by video output circuit and broadcast; The audio signal of demodulation multiplexer after with descrambling enters audio decoder, audio decoder 25 takes out the MPEG-2 voice datas and to transporting to audio level comparator 22 after its decoding, if the user adjusts the audio level of this current channel, then the audio level comparator with adjusted this current channel audio level as the audio level standard value, if the user do not adjust this current channel audio level, then the audio level comparator with this current channel audio level as the audio level standard value; If the user is switching channels not, the audio level comparator need not the current channel audio level is carried out comparing and adjusting with the audio level standard value, directly the current channel audio level is outputed to D/A converter; If user's switching channels, audio level and audio level standard value that the audio level comparator will switch the back channel compare, and calculate audio-frequency electric adjustment Δ V, master controller obtains behind the audio-frequency electric adjustment Δ V according to level difference Δ V greater than 0, less than 0 or equal the audio signal that 0 control audio level adjusting module will switch the back channel and turn down, transfer greatly or not and adjust, the channel audio level is transported to D/A converter after the switching that will adjust the back then or not adjust, broadcasts from output interface module.
Below be the method that this set-top box is regulated sound volume difference between television channels, specifically may further comprise the steps:
One, Network Interface Module receives current channel digital video-audio signal and transports to demodulation multiplexer, the vision signal of demodulation multiplexer after with descrambling carried to output interface module by Video Decoder, analog encoder, the audio signal behind the descrambling is delivered to audio decoder decodes;
Two, be input to audio level comparator one input as the audio level standard value from the current channel audio signal behind the audio decoder decode;
Three, after the audio level comparator receives from the switching of audio decoder during the channel audio signal, the audio signal of switching back channel is input to another input of audio level comparator and the audio level standard value compares, and calculates audio-frequency electric adjustment Δ V;
Four, master controller obtains audio-frequency electric adjustment Δ V:
When Δ V＞0, the audio signal of channel was turned down to equating with the audio level standard value after main controller controls audio level adjusting module will switch, and channel audio signal after the switching after turning down is transported to D/A converter;
When Δ V＜0, the audio signal accent that main controller controls audio level adjusting module will switch the back channel is big to equating that with the audio level standard value audio level of channel is transported to D/A converter after the switching after accent is big;
As Δ V=0, main controller controls audio level adjusting module is not adjusted the audio level that switches the back channel, and the audio level that directly will switch the back channel is transported to D/A converter.
The foregoing description is a preferred implementation of the present invention, and in addition, the present invention can also have other implementations.That is to say that under the prerequisite that does not break away from the present invention's design, any conspicuous replacement also should fall within protection scope of the present invention.
Claims (2)
1. set-top box, comprise master controller (1) and the memory (3) that is connected with master controller, Network Interface Module (20), demodulation multiplexer (21) and output interface module (27), Network Interface Module is connected with the demodulation multiplexer signal, demodulation multiplexer is leaded up to Video Decoder (23), analog encoder (24) is carried vision signal to output interface module, another road is by audio decoder (25), D/A converter (26) is carried audio signal to output interface module, it is characterized in that: be provided with audio level comparator (22) between described audio decoder and the D/A converter, master controller is provided with the audio level adjusting module that audio signal is played corrective action, and the audio level comparator is connected with master controller alternately by the audio level adjusting module.
2. set-top box according to claim 1 is regulated the method for sound volume difference between television channels, it is characterized in that may further comprise the steps:
One, Network Interface Module receives current channel digital video-audio signal and transports to demodulation multiplexer, the vision signal of demodulation multiplexer after with descrambling carried to output interface module by Video Decoder, analog encoder, the audio signal behind the descrambling is delivered to audio decoder decodes;
Two, be input to audio level comparator one input as the audio level standard value from the current channel audio signal behind the audio decoder decode;
Three, after the audio level comparator receives from the switching of audio decoder during the channel audio signal, the audio signal of switching back channel is input to another input of audio level comparator and the audio level standard value compares, and calculates audio-frequency electric adjustment Δ V;
Four, master controller obtains audio-frequency electric adjustment Δ V:
When Δ V＞0, the audio signal of channel was turned down to equating with the audio level standard value after main controller controls audio level adjusting module will switch, and channel audio signal after the switching after turning down is transported to D/A converter,
When Δ V＜0, the audio signal accent that main controller controls audio level adjusting module will switch the back channel equates with the audio level standard value that greatly extremely the audio level of channel is transported to D/A converter after the switching after accent is big,
As Δ V=0, main controller controls audio level adjusting module is not adjusted the audio level that switches the back channel, and the audio level that directly will switch the back channel is transported to D/A converter.
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| CN 200910214487 CN101764919B (en) | 2009-12-29 | 2009-12-29 | Set-top box and method for regulating sound volume difference between television channels |
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| CN 200910214487 CN101764919B (en) | 2009-12-29 | 2009-12-29 | Set-top box and method for regulating sound volume difference between television channels |
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| CN101764919A true CN101764919A (en) | 2010-06-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105810204A (en) * | 2016-03-16 | 2016-07-27 | 深圳市智骏数据科技有限公司 | Audio level detecting and adjusting method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105810204A (en) * | 2016-03-16 | 2016-07-27 | 深圳市智骏数据科技有限公司 | Audio level detecting and adjusting method and device |
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