CN102946520A - Channel volume automatic control method and digital television terminal - Google Patents
Channel volume automatic control method and digital television terminal Download PDFInfo
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- CN102946520A CN102946520A CN2012104229059A CN201210422905A CN102946520A CN 102946520 A CN102946520 A CN 102946520A CN 2012104229059 A CN2012104229059 A CN 2012104229059A CN 201210422905 A CN201210422905 A CN 201210422905A CN 102946520 A CN102946520 A CN 102946520A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/439—Processing of audio elementary streams
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/439—Processing of audio elementary streams
- H04N21/4394—Processing of audio elementary streams involving operations for analysing the audio stream, e.g. detecting features or characteristics in audio streams
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/60—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals
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- Television Receiver Circuits (AREA)
Abstract
The embodiment of the invention discloses a channel volume automatic control method which comprises the following steps: performing T1-duration numeral sampling for primordial audio data of a cached target channel; processing the numeral sampling to obtain a sound volume value; calculating a volume gain factor according to the sound volume value and a volume value preset by a user; adjusting the primordial audio data of the target channel according to the volume gain factor; and outputting adjusted audio data of the target channel. The embodiment of the invention further discloses a digital television terminal. According to the invention, the problem that the volume changes suddenly when a channel or a program is switched during program playing is solved, and the advantages of improved user experience degree and lowered manufacturing cost are realized.
Description
Technical field
The present invention relates to a kind of digital television techniques, relate in particular to a kind of method and digital TV terminal of automatic control frequency channel volume.
Background technology
Along with the fast development of Digital Television, Digital Television with its excellent content, abundant program, image and the more convenient advantage such as user watched are deeply popular clearly, and be more and more universal in life.But also there are some problems simultaneously, because the source of digital television program is different, set-top box is when broadcast program, the program volume size differences that different channel is play is larger, and also exist the program play with the different periods of a channel for example TV play and break for commercialsy between sound volume difference also very large, program volume was prominent large prominent little when this caused switching channels or switches program, had had a strong impact on user's experience.
For overcoming the above problems, part has the TV service operator buying new equipment of technology and economic strength, the recompile processing has been carried out in the audio/video program unification that all plans provide, with the digital volume of each program volume of the unified size of furnishing all, broadcast away more afterwards, so just can guarantee that user's program sound between each channel in watching the program process is consistent.But, owing to need the newly added equipment support, a lot of TV service operators do not have economic condition to implement, and in fact this still and does not solve with the prominent large prominent little problem of the program volume of different periods of a channel, for example the problem of the sound volume difference between TV play and the advertisement intercutted.
Summary of the invention
Embodiment of the invention technical problem to be solved is, a kind of method and digital TV terminal of automatic control frequency channel volume is provided.The prominent large prominent minor issue of program volume improves user experience, and reduces production costs in the time of can solving digital TV terminal at switching channels or switch program.
In order to solve the problems of the technologies described above, on the one hand, the embodiment of the invention provides a kind of method of automatic control frequency channel volume, comprising:
The original audio data of the target channel of buffer memory is carried out the digital sample of T1 duration;
Digital sample information processing according to described T1 duration obtains the sound intensity value;
The loudness value that sets in advance according to described sound intensity value and user calculates the volume gain coefficient;
Original audio data according to the described target channel of described volume gain coefficient adjustment;
The voice data of the described target channel after output is regulated.
Wherein, the original audio data of described target channel to the buffer memory digital sample that carries out the T1 duration comprises:
The original audio data of the described target channel of buffer memory is carried out the digital sample of a described T1 duration;
The described loudness value that sets in advance according to described sound intensity value and user calculates the volume gain coefficient and comprises:
The loudness value that sets in advance according to sound intensity value corresponding to the digital sample information of described T1 duration and described user calculates volume gain coefficient corresponding to described target channel;
Described original audio data according to the described target channel of described volume gain coefficient adjustment comprises:
All original audio data according to the described target channel of described volume gain coefficient adjustment.
Wherein, the original audio data of described target channel to the buffer memory digital sample that carries out the T1 duration comprises:
The original audio data of the described target channel of buffer memory is carried out the cycle digital sample of described T1 duration take described T1 duration as the cycle;
The described loudness value that sets in advance according to described sound intensity value and user calculates the volume gain coefficient and comprises:
The loudness value that sets in advance according to sound intensity value corresponding to the digital sample information of described T1 duration and described user calculates the volume gain coefficient corresponding to digital sample information of described T1 duration;
Described voice data according to the described target channel of described volume gain coefficient adjustment comprises:
Original audio data according to T1 duration corresponding to the digital sample information of the described T1 duration of the described target channel of described volume gain coefficient adjustment.
Wherein, described original audio data according to described described target channel to buffer memory carries out also comprising before the digital sample of a described T1 duration:
Judge whether the described volume gain coefficient that target channel described in the reading database is corresponding;
When being judged as described volume gain coefficient corresponding to target channel described in the reading database not, the original audio data of the described target channel of buffer memory is carried out the digital sample of a described T1 duration, digital sample information processing according to described T1 duration obtains the sound intensity value, the loudness value that sets in advance according to described sound intensity value corresponding to the digital sample information of described T1 duration and described user calculates volume gain coefficient corresponding to described target channel, upgrade described volume gain coefficient corresponding to target channel described in the described database, according to all original audio data of the described target channel of described volume gain coefficient adjustment, and the voice data of the described target channel after the output adjusting;
When being judged as described volume gain coefficient corresponding to target channel described in the reading database, read described volume gain coefficient corresponding to target channel described in the described database, according to all original audio data of the described target channel of described volume gain coefficient adjustment, the voice data of the described target channel after output is regulated.
Wherein, described digital sample information processing according to described T1 duration obtains to comprise after the sound intensity value:
Calculate the difference value between the loudness value that described sound intensity value and described user set in advance;
Judge that described difference value is whether in the difference value scope that allows;
When described difference value was not in the difference value scope in described permission, the loudness value that the described sound intensity value of executive basis and user set in advance calculated volume gain coefficient step.
Wherein, the original audio data of described target channel to the buffer memory digital sample that carries out the T1 duration comprises:
According to the perceived audio frequency range of people's ear and people's ear the susceptibility of described audio frequency is divided into a plurality of frequency ranges with described audio frequency, adopts different sample rates described original audio data to be carried out the digital sample of described T1 duration according to different described frequency ranges.
Wherein, describedly comprise according to the described original audio data of described volume gain coefficient adjustment:
According to the amplitude of the whole described original audio data of described volume gain coefficient adjustment or regulate respectively voice data after the adjusting of the amplitude of original audio data of each described frequency range that described division obtains and each described frequency range of aliasing.
On the other hand, embodiments of the invention provide a kind of digital TV terminal, comprising:
Sampling module is used for the original audio data of the target channel of buffer memory is carried out the digital sample of T1 duration;
Calculate the loudness module, be used for obtaining the sound intensity value according to the digital sample information processing of described T1 duration;
The design factor module is used for calculating the volume gain coefficient according to the loudness value that described sound intensity value and user set in advance;
Adjustment module is used for the original audio data according to the described target channel of described volume gain coefficient adjustment;
Output module is for the voice data of the described target channel after the output adjusting.
Wherein, described sampling module comprises:
The first sampling unit is used for the original audio data of the described target channel of buffer memory is carried out the digital sample of a described T1 duration;
Described design factor module comprises:
The first computing unit is used for calculating volume gain coefficient corresponding to described target channel according to the loudness value that sound intensity value corresponding to the digital sample information of described T1 duration and described user set in advance;
Described adjustment module comprises:
The first regulon is used for all original audio data according to the described target channel of described volume gain coefficient adjustment.
Wherein, described sampling module comprises:
The second sampling unit is for the cycle digital sample that the original audio data of the described target channel of buffer memory is carried out described T1 duration take described T1 duration as the cycle;
Described design factor module comprises:
The second computing unit is used for calculating according to the loudness value that sound intensity value corresponding to the digital sample information of described T1 duration and described user set in advance the volume gain coefficient corresponding to digital sample information of described T1 duration;
Described adjustment module comprises:
The second regulon is used for the original audio data according to T1 duration corresponding to the digital sample information of the described T1 duration of the described target channel of described volume gain coefficient adjustment.
Wherein, it is characterized in that described digital TV terminal also comprises:
The first judge module is used for judging whether the described volume gain coefficient that target channel described in the reading database is corresponding;
Upgrade database module, be used for when being judged as described volume gain coefficient corresponding to target channel described in the reading database not, notify the first sampling unit the original audio data of the target channel of buffer memory to be carried out the digital sample of a described T1 duration, notice is calculated the loudness value module according to the digital sample information processing acquisition sound intensity value of described T1 duration, notify the first computing unit to calculate volume gain coefficient corresponding to described target channel according to the loudness value that sound intensity value corresponding to the digital sample information of described T1 duration and described user set in advance, upgrade described volume gain coefficient corresponding to target channel described in the described database, notify the first regulon all original audio data according to the described target channel of described volume gain coefficient adjustment, and the voice data of the described target channel after the notice output module output adjusting;
Read module, be used for when being judged as described volume gain coefficient corresponding to target channel described in the reading database, read described volume gain coefficient corresponding to target channel described in the described database, notify the first regulon all original audio data according to the described target channel of described volume gain coefficient adjustment, and the voice data of the described target channel after the notice output module output adjusting.
Wherein, described digital TV terminal comprises:
Calculated difference value module is used for calculating the difference value between the loudness value that described sound intensity value and described user set in advance;
The second judge module is used for judging that described difference value is whether in the difference value scope that allows;
When described difference value was not in the difference value scope in described permission, notice design factor module calculated the volume gain coefficient according to the loudness value that described sound intensity value and user set in advance.
Wherein, described sampling module comprises:
Divide the frequency range unit, be used for according to the perceived audio frequency range of people's ear and people's ear the susceptibility of described audio frequency being divided into a plurality of frequency ranges with described audio frequency, adopt different sample rates described original audio data to be carried out the digital sample of described T1 duration according to different described frequency ranges.
Wherein, described adjustment module comprises:
The amplitude adjusted unit is according to the amplitude of the whole described original audio data of described volume gain coefficient adjustment or regulate separately voice data after the adjusting of the amplitude of original audio data of each described frequency range that described division obtains and each described frequency range of aliasing.
Implement the embodiment of the invention, have following beneficial effect:
The embodiment of the invention carries out digital sample and calculates the voice data that is buffered in digital TV terminal obtaining the volume gain coefficient in the different characteristics of the susceptibility of each frequency to sound according to people's ear, original audio data according to volume gain coefficient adjustment target channel, making the actual voice data loudness of output set in advance loudness with the user reaches an agreement, the prominent large prominent little problem of program volume when this efficiently solves switching channels or switches program, and the embodiment of the invention is on present existing digital-television terminal equipment hardware foundation the volume of each program have been done unitized preliminary treatment to make different program volumes automatically adjust to the typical problem size, effectively reduce the production cost of the digital TV terminal with embodiment of the invention function, and the embodiment of the invention is adjusted to program volume the impact of people's ear minimum automatically, has improved user's Experience Degree.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the first embodiment schematic flow sheet of the method for a kind of automatic control frequency channel volume of the present invention;
Fig. 2 is the second embodiment schematic flow sheet of the method for a kind of automatic control frequency channel volume of the present invention;
Fig. 3 is the 3rd embodiment schematic flow sheet of the method for a kind of automatic control frequency channel volume of the present invention;
Fig. 4 is the first example structure schematic diagram of a kind of digital TV terminal of the present invention;
Fig. 5 is the second example structure schematic diagram of a kind of digital TV terminal of the present invention;
Fig. 6 is the 3rd example structure schematic diagram of a kind of digital TV terminal of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
In the embodiment of the invention, digital TV terminal can be digital TV set-top box, and digital TV integrated machine etc. possess equipment unidirectional or the bi-directional digital television function.
Please refer to Fig. 1, be first embodiment schematic flow sheet of method of a kind of automatic control frequency channel volume of the present invention.As described in Figure 1, the method for the described a kind of automatic control frequency channel volume of present embodiment comprises step:
S100 carries out the digital sample of T1 duration to the original audio data of the target channel of buffer memory.
In the specific embodiment, digital TV terminal passes through the front voice data of decoding that demultiplexing module (Demultiplexer, DMUX) obtains target channel, and the voice data before this decoding is buffered in digital TV terminal and this voice data is carried out preliminary treatment.Because people's ear is different to the sensitivity of awareness at each frequency sound, minimum for program volume being adjusted on the impact of people's ear, so thereby can adopt the voice data according to different frequency to carry out different processing reduction program volumes to the impact of people's ear.So the described digital sample that carries out the T1 duration can be divided into a plurality of frequency ranges to the susceptibility of audio frequency with audio frequency according to the perceived audio frequency range of people's ear and people's ear, adopt different sample rates that the voice data of T1 duration is carried out digital sample according to different frequency ranges.
Wherein, the described digital sample that carries out the T1 duration will adopt two kinds of method of samplings in the present invention, first method is the digital sample that carries out a T1 duration, second method is the cycle digital sample take the T1 duration as the cycle, two kinds of corresponding two embodiment of method, embodiment two and embodiment three describe below.
Wherein optional, the T1 duration can be with reference between 20MS ~ 1S scope, and the T1 duration that different application scenarios is selected may be also different.
Concrete, the division of audio frequency and corresponding sample frequency can be with reference to following tables:
S101 is according to the digital sample information processing acquisition sound intensity value of described T1 duration.
In the specific embodiment, the sampled data of each frequency range that sampling obtains to step S100 obtains the acoustic pressure data of each frequency range by integral and calculating.
Further, can with reference to following form to the difference of the data based frequency of acoustic pressure of each frequency range of obtaining the weighting of doing respectively to decay process the value of directly cumulative gained as the original loudness data of voice data, the data of decay can by the technical staff according to actual conditions change adjust.
| Frequency (Hz) | <31.5 | <63 | <125 | <250 | <500 | <1000 | <2000 | <4000 | More than |
| Decay (dB) | -39.4 | -26.2 | -16.1 | -8.6 | -3.2 | 0 | 1.2 | 1.0 | -1.1 |
S102, the loudness value that sets in advance according to described sound intensity value and user calculates the volume gain coefficient.
Wherein, the loudness value that described user sets in advance is that laboratory goes out standard loudness data corresponding to different level of sound volume and pre-stored in the database of digital TV terminal by the standard audio signal testing, for example: standard loudness data of 23 correspondences of volume, 24 corresponding another one normal datas of volume, other different level of sound volume are corresponding different standard loudness data all, and different user adapts to the loudness of oneself by selecting different volumes to select.
Wherein optional, described volume gain coefficient can be the merchant of the loudness value that described sound intensity value and described user set in advance.
S103 is according to the described original audio data of described volume gain coefficient adjustment.
In the specific embodiment, regulate original audio data and be according to the amplitude of the whole original audio data of volume gain coefficient adjustment or regulate separately the amplitude of the voice data of dividing each frequency range that obtains and adjusting that the voice data of each frequency range of aliasing forms after voice data, wherein optional, the voice data amplitude after the adjustment can be the merchant of original audio data amplitude and volume gain coefficient.
S104, the voice data of the described target channel after output is regulated.
In the specific embodiment, the voice data of the target channel after regulating outputed to the D/A module or will regulate by digital channel after the data of target channel pass to peripheral hardware and carry out again D/A by peripheral hardware and change, export again the actual programs audio frequency.
Further alternative, because after digital audio and video signals is changed through D/A, also have through one or more levels amplification and play out again, because the frequency characteristic of different its amplifying circuits of audio frequency also is different, therefore can when calculating sound intensity, frequency characteristic be taken into account, revise different weights attenuation coefficient corresponding to different frequency, concrete grammar can be to the digital audio amplitude-versus-frequency curve before the input of audio amplifier circuit and the test of sampling of the digital audio amplitude-versus-frequency curve after amplifying, comparing difference, the linear differences ratio that draws sampled point is come the weighting attenuation coefficient is revised.
Please refer to Fig. 2, be second embodiment schematic flow sheet of method of a kind of automatic control frequency channel volume of the present invention.As shown in Figure 2, the method for the described a kind of automatic control frequency channel volume of present embodiment comprises step:
S200 judges whether the volume gain coefficient that target channel described in the reading database is corresponding, if the determination result is NO, and execution in step S201 then, if judged result is yes, execution in step S207 then.
Concrete, this step can be carried out when target channel switches, digital television terminal system can allow the user whether select volume gain coefficient corresponding to target channel in the reading database eject to play window or other modes, or further alternative, whether store volume gain coefficient corresponding to target channel in the digital television terminal system automatic decision database, if do not store volume gain coefficient corresponding to target channel, execution in step S201 then, if volume gain coefficient corresponding to storage target channel arranged, then execution in step S207.
S201 carries out the digital sample of a described T1 duration to the original audio data of the described target channel of buffer memory.
In the specific embodiment, because people's ear is different to the sensitivity of awareness at each frequency sound, minimum for program volume being adjusted on the impact of people's ear, so thereby can adopt the voice data according to different frequency to carry out different processing reduction program volumes to the impact of people's ear.So the described digital sample that carries out the T1 duration can be divided into a plurality of frequency ranges to the susceptibility of audio frequency with audio frequency according to the perceived audio frequency range of people's ear and people's ear, adopt different sample rates that the voice data of T1 duration is carried out digital sample according to different frequency ranges.
Wherein, the method for sampling that adopts in the present embodiment of the digital sample of the described T1 of carrying out duration is the digital sample that carries out a T1 duration.
Wherein optional, the T1 duration can be with reference between 20MS ~ 1S scope, and the T1 duration that different application scenarios is selected may be also different.
Concrete, the division of audio frequency can be with reference to following table with corresponding sample frequency
S202 is according to the digital sample information processing acquisition sound intensity value of described T1 duration.
S203 calculates the difference value between the loudness value that described sound intensity value and described user set in advance.
In the specific embodiment, difference value is the absolute value of difference of the loudness value that sets in advance with the user of sound intensity value.
S204 judges described difference value whether in the difference value scope that allows, if the determination result is NO, and execution in step S205 then.
In the specific embodiment, be that then all voice datas of target channel need through just output of preliminary treatment, namely not exported all original audio data of described target channel if be judged as.Wherein, the difference value scope of permission is more than or equal to 0db and is less than or equal to 2db.
S205, the loudness value that sets in advance according to sound intensity value corresponding to the digital sample information of described T1 duration and described user calculates volume gain coefficient corresponding to described target channel.
Wherein, the loudness value that described user sets in advance is that laboratory goes out standard loudness data corresponding to different level of sound volume and pre-stored in the database of digital TV terminal by the standard audio signal testing, for example: standard loudness data of 23 correspondences of volume, 24 corresponding another one normal datas of volume, other different level of sound volume are corresponding different standard loudness data all, and different user adapts to the loudness of oneself by selecting different volumes to select.
Wherein optional, described volume gain coefficient can be the merchant of the loudness value that described sound intensity value and described user set in advance.
Volume gain coefficient corresponding to the target channel that wherein, calculates is the volume gain coefficient corresponding to voice data of target channel integral body.
S206 upgrades described volume gain coefficient corresponding to target channel described in the described database.
In concrete the application, for example: play Shenzhen satellite TV channel if digital TV terminal switches to, the volume gain coefficient that Shenzhen satellite TV channel that digital TV terminal then calculates step S205 is corresponding replaces the existing volume gain coefficient that Shenzhen satellite TV channel is corresponding in the database or save as volume gain coefficient corresponding to Shenzhen satellite TV channel in database, can adjust program volume at the volume gain coefficient that receive this channel that switch to Shenzhen satellite TV information time configuration calculates specifically next time.
S207, the described volume gain coefficient that target channel described in the reading database is corresponding.
Wherein, carry out execution in step S208 after described volume gain coefficient step corresponding to target channel described in the reading database.
S208 is according to all original audio data of the described target channel of described volume gain coefficient adjustment.
In the specific embodiment, all original audio data of regulating target channel be according to the amplitude of the whole described original audio data of described volume gain coefficient adjustment or regulate respectively the amplitude of original audio data of each described frequency range that described division obtains and adjusting that the voice data of each frequency range of aliasing forms after voice data, wherein optional, the voice data amplitude after the adjustment can be the merchant of original audio data amplitude and volume gain coefficient.
Further alternative, according to step S206 volume gain coefficient corresponding to target channel or regulate all original audio data of described target channel according to a volume gain coefficient corresponding to target channel in the step S207 reading database in the new database more.For example in actual applications, if switching to, digital TV terminal plays Shenzhen satellite TV channel, obtain volume gain coefficient corresponding to Shenzhen satellite TV according to step S206 or step S207 this moment, regulates all voice datas of Shenzhen satellite TV channel according to this volume gain coefficient.
S209, the voice data of the described target channel after output is regulated.
Wherein, step S202 and step S209 can referring to the detailed description of step S101 embodiment illustrated in fig. 1 and step S104, be not repeated herein.
Please refer to Fig. 3, be the 3rd embodiment schematic flow sheet of method of a kind of automatic control frequency channel volume of the present invention.As shown in Figure 3, the method for the described a kind of automatic control frequency channel volume of present embodiment comprises step:
S300 carries out the cycle digital sample of described T1 duration to the original audio data of the described target channel of buffer memory take described T1 duration as the cycle.
In the specific embodiment, because people's ear is different to the sensitivity of awareness at each frequency sound, minimum for program volume being adjusted on the impact of people's ear, so thereby can adopt the voice data according to different frequency to carry out different processing reduction program volumes to the impact of people's ear.So the described digital sample that carries out the T1 duration can be divided into a plurality of frequency ranges to the susceptibility of audio frequency with audio frequency according to the perceived audio frequency range of people's ear and people's ear, adopt different sample rates that the voice data of T1 duration is carried out digital sample according to different frequency ranges.
Wherein, the method for sampling that adopts in the present embodiment of the described digital sample that carries out the T1 duration is the cycle digital sample take the T1 duration as the cycle.
Wherein optional, the original audio data of the target channel of buffer memory is uninterruptedly to upgrade the original audio data of buffer memory until user's switching channels or shutdown according to user's needs, the cycle digital sample of T1 duration comprises that to the original audio data of buffer memory the original audio data of renewal is sampled until user's switching channels or shutdown then stop sampling, wherein, the T1 duration original audio data incomplete repeated sampling of the periodic sampling of T1 duration to sampling.
Wherein optional, in order to reduce unsmooth between two sampling periods, among two adjacent sampling period T1 the overlapping of T2 time can be arranged, wherein T2＜T1.
Wherein optional, the T1 duration can be with reference between 20MS ~ 1S scope, and the T1 duration that different application scenarios is selected may be also different.
Concrete, the division of audio frequency and corresponding sample frequency can be with reference to following tables:
S301 is according to the digital sample information processing acquisition sound intensity value of described T1 duration.
S302 calculates the difference value between the loudness value that described sound intensity value and described user set in advance.
S303 judges described difference value whether in the difference value scope that allows, if the determination result is NO, and execution in step S304 then.
In the specific embodiment, be that then the original audio data of T1 duration corresponding to the digital sample information of T1 duration need be through just output of preliminary treatment if be judged as.Namely export the original audio data of T1 duration corresponding to the digital sample information of T1 duration.
Wherein, the difference value scope of permission is more than or equal to 0db and is less than or equal to 2db.
S304, the loudness value that sets in advance according to sound intensity value corresponding to the digital sample information of described T1 duration and described user calculates the volume gain coefficient corresponding to digital sample information of described T1 duration.
Wherein, the loudness value that described user sets in advance is that laboratory goes out standard loudness data corresponding to different level of sound volume and pre-stored in the database of digital TV terminal by the standard audio signal testing, for example, standard loudness data of 23 correspondences of volume, 24 corresponding another one normal datas of volume, other different level of sound volume are corresponding different standard loudness data all, and different user adapts to the loudness of oneself by selecting different volumes to select.
Wherein optional, described volume gain coefficient can be the merchant of the loudness value that described sound intensity value and described user set in advance.
Volume gain coefficient corresponding to the digital sample information of the described T1 duration that wherein, calculates is the volume gain coefficient of the original audio data of T1 duration corresponding to the digital sample information of target channel T1 duration.
S305 is according to the original audio data of T1 duration corresponding to the data sampling information of the T1 duration of the described target channel of described volume gain coefficient adjustment.
In the specific embodiment, the original audio data of regulating T1 duration corresponding to the data sampling information of T1 duration of target channel is to divide the voice data of the T1 duration after the adjusting that the voice data of the amplitude of voice data of each frequency range that obtains and each frequency range of aliasing forms according to the amplitude of the whole original audio data of volume gain coefficient adjustment T1 duration or the original audio data of regulating separately the T1 duration, wherein optional, the voice data amplitude after the adjustment can be the merchant of original audio data amplitude and volume gain coefficient.
Further alternative, a volume gain coefficient corresponding to digital sample information of the T1 duration that calculates according to step S304 regulated the original audio data of T1 duration corresponding to the digital sample information of T1 duration of described target channel.For example in actual applications, if switching to, digital TV terminal plays Shenzhen satellite TV channel, calculate the volume gain coefficient corresponding to digital sample information of the T1 of Shenzhen satellite TV duration this moment according to step S304, regulate the original audio data of T1 duration corresponding to the digital sample information of T1 duration of Shenzhen satellite TV channel according to this volume gain coefficient, then at next T1 in the time, digital TV terminal calculates the next volume gain coefficient corresponding to digital sample information of the next T1 duration of Shenzhen satellite TV again according to step S304, regulate the original audio data of T1 duration corresponding to the digital sample information of next T1 duration of Shenzhen satellite TV channel according to next volume gain coefficient corresponding to the digital sample information of this next T1 duration, regulate take the T1 duration as regulating cycle until the user switches to other channels or shutdown just stops to regulate like this, this kind regulative mode can effectively solve the different program volume difference problems with a channel, for example: the problem of the sound volume difference between TV play and the advertisement intercutted.
Wherein optional, in order to reduce unsmooth between two sampling periods, among two adjacent regulating cycle T1 the overlapping of T2 time can be arranged, wherein T2＜T1.
S306, the voice data of the target channel after output is regulated.
Wherein, step S301 and step S306 can be referring to step S101 embodiment illustrated in fig. 1 and step S104, and step S302 can referring to step S202 embodiment illustrated in fig. 2, seldom give unnecessary details at this.
The specific implementation of a kind of digital TV terminal that the below's elaboration embodiment of the invention provides.
Please refer to Fig. 4, be digital TV terminal the first example structure schematic diagram of the present invention.As shown in Figure 4, the described a kind of digital TV terminal of present embodiment comprises:
In the specific embodiment, digital TV terminal passes through the front voice data of decoding that demultiplexing module (Demultiplexer, DMUX) obtains target channel, and the voice data before this decoding is buffered in digital TV terminal and this voice data is carried out preliminary treatment.Because people's ear is different to the sensitivity of awareness of each frequency sound, minimum for program volume being adjusted on the impact of people's ear, so thereby can carry out according to the voice data of different frequency different processing and reduce program volume to the impact of people's ear.So the described digital sample that carries out the T1 duration can be according to the perceived audio frequency range of people's ear and people's ear the susceptibility of audio frequency to be divided into a plurality of frequency ranges with audio frequency, adopt different sample rates that the voice data of T1 duration is carried out digital sample according to different frequency ranges.
Wherein, the described digital sample that carries out the T1 duration will adopt two kinds of sampling units in the present embodiment, the first sampling unit is the digital sample that carries out a T1 duration, the second sampling unit is the cycle digital sample take the T1 duration as the cycle, two kinds of corresponding two embodiment in unit, embodiment two and embodiment three describe below.
Wherein optional, T1 duration cocoa is with reference between 20MS ~ 1S scope, and the T1 duration that different application scenarios is selected may be also different.
Concrete, the division of audio frequency and corresponding sample frequency can be with reference to following tables:
Calculate loudness module 200, be used for obtaining the sound intensity value according to the digital sample information processing of described T1 duration.
In the specific embodiment, calculating loudness module 200 is the sampled data of each frequency range that 100 samplings obtain to sampling module obtains each frequency range by integral and calculating acoustic pressure data.
Further, can with reference to following form to the difference of the data based frequency of acoustic pressure of each frequency range of obtaining the weighting of doing respectively to decay process the value of directly cumulative gained as the original loudness data of voice data, the data of decay can by the technical staff according to actual conditions change adjust.
| Frequency (Hz) | <31.5 | <63 | <125 | <250 | <500 | <1000 | <2000 | <4000 | More than |
| Decay (dB) | -39.4 | -26.2 | -16.1 | -8.6 | -3.2 | 0 | 1.2 | 1.0 | -1.1 |
Wherein, the loudness value that described user sets in advance is that laboratory goes out standard loudness data corresponding to different level of sound volume and pre-stored in the database of digital TV terminal by the standard audio signal testing, for example: standard loudness data of 23 correspondences of volume, 24 corresponding another one normal datas of volume, other different level of sound volume are corresponding different standard loudness data all, and different user adapts to the loudness of oneself by selecting different volumes to select.
Wherein optional, described volume gain coefficient is the merchant of the loudness value that sets in advance of described sound intensity value and described user.
In the specific embodiment, adjustment module 400 be according to the amplitude of the whole original audio data of volume gain coefficient adjustment or regulate separately the amplitude of the voice data of dividing each frequency range that obtains and adjusting that the voice data of each frequency range of aliasing forms after voice data, wherein optional, the voice data amplitude after the adjustment is the merchant of original audio data amplitude and volume gain coefficient.
In the specific embodiment, the voice data of the target channel after will regulating through adjustment module 400 output to the D/A module or will regulate by digital channel after the data of target channel pass to peripheral hardware and carry out again D/A by peripheral hardware and change, export again the actual programs audio frequency.
Further alternative, because after digital audio and video signals is changed through D/A, also have through one or more levels amplification and play out again, because the frequency characteristic of different its amplifying circuits of audio frequency also is different, therefore can when calculating sound intensity, frequency characteristic be taken into account, revise different weights attenuation coefficient corresponding to different frequency, test that concrete grammar can be the digital audio amplitude-versus-frequency curve before the input of audio amplifier circuit and the digital audio amplitude-versus-frequency curve after amplifying is sampled, comparing difference, the linear differences ratio that draws sampled point is come the weighting attenuation coefficient is revised.
Please refer to Fig. 5, be a kind of digital TV terminal the second example structure schematic diagram of the present invention.As shown in Figure 5, the described a kind of digital TV terminal of present embodiment comprises:
Wherein, this digital television terminal also can further comprise:
The first judge module 101, be used for judging whether the volume gain coefficient that target channel described in the reading database is corresponding, if the determination result is NO, then notify the original audio data of the target channel of 10 pairs of buffer memorys of the first sampling unit to carry out the digital sample of T1 duration, if judged result is yes, described volume gain coefficient corresponding to target channel described in read module 201 reading databases then notify.
Concrete, the first judge module 101 can begin to carry out when target channel switches, digital television terminal system can allow the user whether select volume gain coefficient corresponding to target channel in the reading database eject to play window or other modes, or further alternative, whether store volume gain coefficient corresponding to target channel in the digital television terminal system automatic decision database, if do not have, then notify the original audio data of the target channel of 10 pairs of buffer memorys of the first sampling unit to carry out the digital sample of a T1 duration, if have, described volume gain coefficient corresponding to target channel described in read module 201 reading databases then notify.
Read module 201 is used for described volume gain coefficient corresponding to target channel described in the reading database.
Behind described volume gain coefficient corresponding to target channel described in read module 201 reading databases, notify the first regulon 50 all original audio data according to the described target channel of described volume gain coefficient adjustment.
Calculated difference value module 301 is used for calculating the difference value between the loudness value that described sound intensity value and described user set in advance.
In the specific embodiment, difference value is the absolute value of difference of the loudness value that sets in advance with the user of sound intensity value.
The second judge module 401, be used for judging that described difference value is whether in the difference value scope that allows, if the determination result is NO for the second judging unit 401, then notify the first computing unit 30 to calculate volume gain coefficient corresponding to described target channel according to the loudness value that sound intensity value corresponding to the digital sample information of described T1 duration and described user set in advance.
In the specific embodiment, be that then the original audio data of described target channel need be through preliminary treatment output if the second judge module 401 is judged as.Wherein, the difference value scope of permission is more than or equal to 0db and is less than or equal to 2db.
Upgrade database module 501, be used for upgrading described volume gain coefficient corresponding to target channel described in the described database.
In concrete the application, for example: play Shenzhen satellite TV channel if digital TV terminal switches to, the volume gain coefficient that Shenzhen satellite TV channel that digital TV terminal then calculates the first computing unit 30 is corresponding replaces the existing volume gain coefficient that Shenzhen satellite TV channel is corresponding in the database or save as volume gain coefficient corresponding to Shenzhen satellite TV channel in database, can adjust program volume at the volume gain coefficient that receive this channel that switch to Shenzhen satellite TV information time configuration calculates specifically next time.
Wherein, described sampling module 100 also can further comprise:
The first sampling unit 10 is used for the original audio data of the target channel of buffer memory is carried out the digital sample of a T1 duration.
In the specific embodiment, because people's ear is different to the sensitivity of awareness at each frequency sound, minimum for program volume being adjusted on the impact of people's ear, so can not adopt the size of simply weighing current sound according to the sound intensity of audio frequency, reduce program volume to the impact of people's ear thereby for example carry out different processing according to the voice data of different frequency.So the described digital sample that carries out the T1 duration can be divided into a plurality of frequency ranges to the susceptibility of audio frequency with audio frequency according to the perceived audio frequency range of people's ear and people's ear, adopt different sample rates that the voice data of T1 duration is carried out digital sample according to different frequency ranges.
Wherein, the method for sampling that adopts in the present embodiment of the digital sample of the described T1 of carrying out duration is the digital sample that carries out a T1 duration.
Wherein optional, the T1 duration can be with reference between 20MS ~ 1S scope, and the T1 duration that different application scenarios is selected may be also different.
Concrete, the division of audio frequency and corresponding sample frequency can be with reference to following tables:
Divide frequency range unit 20, be used for according to the perceived audio frequency range of people's ear and people's ear the susceptibility of audio frequency being divided into a plurality of frequency ranges with audio frequency, adopt different sample rates described original audio data to be carried out the digital sample of described T1 duration according to different frequency ranges.
Described design factor module 300 also can further comprise:
The first computing unit 30 is used for calculating volume gain coefficient corresponding to described target channel according to the loudness value that sound intensity value corresponding to the digital sample information of described T1 duration and described user set in advance.
Wherein, the first computing unit 30 is to calculate volume gain coefficient corresponding to target channel according to the loudness value that sound intensity value corresponding to digital sample information of calculating the T1 duration that loudness module 200 calculates sets in advance in conjunction with the user again.
Wherein, the loudness value that described user sets in advance is that laboratory goes out standard loudness data corresponding to different level of sound volume and pre-stored in the database of digital TV terminal by the standard audio signal testing, for example: standard loudness data of 23 correspondences of volume, 24 corresponding another one normal datas of volume, other different level of sound volume are corresponding different standard loudness data all, and different user adapts to the loudness of oneself by selecting different volumes to select.
Wherein optional, described volume gain coefficient can be the merchant of the loudness value that described sound intensity value and described user set in advance.
Volume gain coefficient corresponding to the target channel that wherein, calculates is the volume gain coefficient corresponding to voice data of target channel integral body.
Described regulon 400 also can further comprise:
Amplitude adjusted unit 40, be used for according to the amplitude of the whole described original audio data of described volume gain coefficient adjustment or regulate respectively the amplitude of original audio data of each described frequency range that described division obtains and the adjusting of each described frequency range of aliasing after voice data.
Wherein optional, the voice data amplitude after the adjustment can be the merchant of original audio data amplitude and volume gain coefficient.
The first regulon 50 is used for all original audio data according to the described target channel of described volume gain coefficient adjustment.
In the specific embodiment, the first regulon 50 is regulated all original audio data of described target channel according to amplitude adjusted unit 40.
Further, according to volume gain coefficient corresponding to target channel in read module 201 reading databases or upgrade 501 of database module more in the new database volume gain coefficient corresponding to target channel regulate all original audio data of described target channel.For example in actual applications, if switching to, digital TV terminal plays Shenzhen satellite TV channel, obtain volume gain coefficient corresponding to Shenzhen satellite TV according to upgrading database module 501 or read module 201 this moment, regulates all voice datas of Shenzhen satellite TV channel according to this volume gain coefficient.
Please refer to Fig. 6, for being digital TV terminal the 3rd example structure schematic diagram of the present invention.As shown in Figure 6, the described a kind of digital TV terminal of present embodiment comprises:
The division frequency range unit 20 that sampling module 100, calculating loudness module 200, design factor module 300, adjustment module 400, output module 500, calculated difference value module 301 and the second judge module 401 and sampling module 100 comprise, the amplitude adjusted unit 40 that adjustment module comprises.
Wherein, described sampling module 100 also can further comprise:
The second sampling unit 60 is for the cycle digital sample that the original audio data of the target channel of buffer memory is carried out described T1 duration take described T1 duration as the cycle.
In the specific embodiment, because people's ear is different to the sensitivity of awareness at each frequency sound, minimum for program volume being adjusted on the impact of people's ear, so thereby can adopt the voice data according to different frequency to carry out different processing reduction program volumes to the impact of people's ear.So the described digital sample that carries out the T1 duration can be divided into a plurality of frequency ranges to the susceptibility of audio frequency with audio frequency according to the perceived audio frequency range of people's ear and people's ear, adopt different sample rates that the voice data of T1 duration is carried out digital sample according to different frequency ranges.
Wherein, the method for sampling that adopts in the present embodiment of the described digital sample that carries out the T1 duration is the cycle digital sample take the T1 duration as the cycle.
Wherein optional, the original audio data of the target channel of buffer memory is uninterruptedly to upgrade the original audio data of buffer memory until user's switching channels or shutdown according to user's needs, the cycle digital sample of T1 duration comprises that to the original audio data of buffer memory the original audio data of renewal is sampled until user's switching channels or shutdown then stop sampling, wherein, the T1 duration original audio data incomplete repeated sampling of the periodic sampling of T1 duration to sampling.
Wherein optional, in order to reduce unsmooth between two sampling periods, among two adjacent sampling period T1 the overlapping of T2 time can be arranged, wherein T2＜T1.
Wherein optional, the T1 duration can be with reference between 20MS ~ 1S scope, and the T1 duration that different application scenarios is selected may be also different.
Concrete, the division of audio frequency and corresponding sample frequency can be with reference to following tables:
Described design factor module 300 also can further comprise:
The second computing unit 70 is used for calculating according to the loudness value that sound intensity value corresponding to the digital sample information of described T1 duration and described user set in advance the volume gain coefficient corresponding to digital sample information of described T1 duration.
Wherein, the loudness value that described user sets in advance is that laboratory goes out standard loudness data corresponding to different level of sound volume and pre-stored in the database of digital TV terminal by the standard audio signal testing, for example, standard loudness data of 23 correspondences of volume, 24 corresponding another one normal datas of volume, other different level of sound volume are corresponding different standard loudness data all, and different user adapts to the loudness of oneself by selecting different volumes to select.
Wherein optional, described volume gain coefficient can be the merchant of the loudness value that described sound intensity value and described user set in advance.
Volume gain coefficient corresponding to the digital sample information of the described T1 duration that wherein, calculates is the volume gain coefficient of the original audio data of T1 duration corresponding to the digital sample information of target channel T1 duration.
Described adjustment module 400 also can further comprise:
The second regulon 80 is used for T1 duration original audio data corresponding to data sampling information according to the T1 duration of the described target channel of described volume gain coefficient adjustment.
In the specific embodiment, the second regulon 80 is according to the original audio data of T1 duration corresponding to the data sampling information of the T1 duration of amplitude adjusted unit 40 adjusting target channel.
Further, a volume gain coefficient corresponding to T1 duration data sampling information that calculate according to the second computing unit 70 of the second regulon 80 T1 duration original audio data corresponding to data sampling information of regulating the T1 duration of described target channel.For example in actual applications, if switching to, digital TV terminal plays Shenzhen satellite TV channel, this moment, the second computing unit 70 calculated the volume gain coefficient corresponding to original audio data of the T1 of Shenzhen satellite TV duration, regulate the original audio data of T1 duration corresponding to the digital sample information of T1 duration of Shenzhen satellite TV channel according to this volume gain coefficient, then digital TV terminal obtains another volume gain coefficient corresponding to digital sample information of another T1 duration of Shenzhen satellite TV again according to step the second computing unit 70, regulate the original audio data of the corresponding T1 duration of digital sample information of another T1 duration of Shenzhen satellite TV channel according to another volume gain coefficient corresponding to the digital sample information of this another T1 duration, regulate take the T1 duration as regulating cycle until the user switches to other channels or shutdown just stops to regulate this kind regulative mode and can effectively solve different program volume difference problems with individual channel, for example: the problem of the sound volume difference between TV play and the advertisement intercutted like this.
Wherein optional, in order to reduce unsmooth between two sampling periods, among two adjacent regulating cycle T1 the overlapping of T2 time can be arranged, wherein T2＜T1.
By the description of above-described embodiment, the present invention has the following advantages:
The embodiment of the invention carries out digital sample and calculates the voice data that is buffered in digital TV terminal obtaining the volume gain coefficient in the different characteristics of the susceptibility of each frequency to sound according to people's ear, original audio data according to volume gain coefficient adjustment target channel, making the actual voice data loudness of output set in advance loudness with the user reaches an agreement, the prominent large prominent little problem of program volume when this efficiently solves switching channels or switches program, and the embodiment of the invention is on present existing digital-television terminal equipment hardware foundation the volume of each program have been done unitized preliminary treatment to make different program volumes automatically adjust to the typical problem size, effectively reduce the production cost of the digital TV terminal with embodiment of the invention function, and the embodiment of the invention is adjusted to program volume the impact of people's ear minimum automatically, has improved user's Experience Degree.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in above-described embodiment method, to come the relevant hardware of instruction to finish by computer program, described program can be stored in the computer read/write memory medium, this program can comprise the flow process such as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or store-memory body (Random Access Memory, RAM) etc. at random.
Above disclosed is preferred embodiment of the present invention only, certainly can not limit with this interest field of the present invention, and the equivalent variations of therefore doing according to claim of the present invention still belongs to the scope that the present invention is contained.
Claims (14)
1. a method of automatically controlling frequency channel volume is characterized in that, comprising:
The original audio data of the target channel of buffer memory is carried out the digital sample of T1 duration;
Digital sample information processing according to described T1 duration obtains the sound intensity value;
The loudness value that sets in advance according to described sound intensity value and user calculates the volume gain coefficient;
Original audio data according to the described target channel of described volume gain coefficient adjustment;
The voice data of the described target channel after output is regulated.
2. the method for claim 1 is characterized in that, the digital sample that the original audio data of described target channel to buffer memory is carried out the T1 duration comprises:
The original audio data of the described target channel of buffer memory is carried out the digital sample of a described T1 duration;
The described loudness value that sets in advance according to described sound intensity value and user calculates the volume gain coefficient and comprises:
The loudness value that sets in advance according to sound intensity value corresponding to the digital sample information of described T1 duration and described user calculates volume gain coefficient corresponding to described target channel;
Described original audio data according to the described target channel of described volume gain coefficient adjustment comprises:
All original audio data according to the described target channel of described volume gain coefficient adjustment.
3. the method for claim 1 is characterized in that, the digital sample that the original audio data of described target channel to buffer memory is carried out the T1 duration comprises:
The original audio data of the described target channel of buffer memory is carried out the cycle digital sample of described T1 duration take described T1 duration as the cycle;
The described loudness value that sets in advance according to described sound intensity value and user calculates the volume gain coefficient and comprises:
The loudness value that sets in advance according to sound intensity value corresponding to the digital sample information of described T1 duration and described user calculates the volume gain coefficient corresponding to digital sample information of described T1 duration;
Described voice data according to the described target channel of described volume gain coefficient adjustment comprises:
Original audio data according to T1 duration corresponding to the digital sample information of the described T1 duration of the described target channel of described volume gain coefficient adjustment.
4. method as claimed in claim 2 is characterized in that, described original audio data according to described described target channel to buffer memory carries out also comprising before the digital sample of a described T1 duration:
Judge whether the described volume gain coefficient that target channel described in the reading database is corresponding;
When being judged as described volume gain coefficient corresponding to target channel described in the reading database not, the original audio data of the described target channel of buffer memory is carried out the digital sample of a described T1 duration, digital sample information processing according to described T1 duration obtains the sound intensity value, the loudness value that sets in advance according to described sound intensity value corresponding to the digital sample information of described T1 duration and described user calculates volume gain coefficient corresponding to described target channel, upgrade described volume gain coefficient corresponding to target channel described in the described database, according to all original audio data of the described target channel of described volume gain coefficient adjustment, and the voice data of the described target channel after the output adjusting;
When being judged as described volume gain coefficient corresponding to target channel described in the reading database, read described volume gain coefficient corresponding to target channel described in the described database, according to all original audio data of the described target channel of described volume gain coefficient adjustment, the voice data of the described target channel after output is regulated.
5. the method for claim 1 is characterized in that, described digital sample information processing according to described T1 duration obtains to comprise after the sound intensity value:
Calculate the difference value between the loudness value that described sound intensity value and described user set in advance;
Judge that described difference value is whether in the difference value scope that allows;
When described difference value was not in the difference value scope in described permission, the loudness value that the described sound intensity value of executive basis and user set in advance calculated volume gain coefficient step.
6. the method for claim 1 is characterized in that, the digital sample that the original audio data of described target channel to buffer memory is carried out the T1 duration comprises:
According to the perceived audio frequency range of people's ear and people's ear the susceptibility of described audio frequency is divided into a plurality of frequency ranges with described audio frequency, adopts different sample rates described original audio data to be carried out the digital sample of described T1 duration according to different described frequency ranges.
7. method as claimed in claim 6 is characterized in that, describedly comprises according to the described original audio data of described volume gain coefficient adjustment:
According to the amplitude of the whole described original audio data of described volume gain coefficient adjustment or regulate respectively voice data after the adjusting of the amplitude of original audio data of each described frequency range that described division obtains and each described frequency range of aliasing.
8. a digital TV terminal of automatically controlling frequency channel volume is characterized in that, comprising:
Sampling module is used for the original audio data of the target channel of buffer memory is carried out the digital sample of T1 duration;
Calculate the loudness module, be used for obtaining the sound intensity value according to the digital sample information processing of described T1 duration;
The design factor module is used for calculating the volume gain coefficient according to the loudness value that described sound intensity value and user set in advance;
Adjustment module is used for the original audio data according to the described target channel of described volume gain coefficient adjustment;
Output module is for the voice data of the described target channel after the output adjusting.
9. digital TV terminal as claimed in claim 8 is characterized in that, described sampling module comprises:
The first sampling unit is used for the original audio data of the described target channel of buffer memory is carried out the digital sample of a described T1 duration;
Described design factor module comprises:
The first computing unit is used for calculating volume gain coefficient corresponding to described target channel according to the loudness value that sound intensity value corresponding to the digital sample information of described T1 duration and described user set in advance;
Described adjustment module comprises:
The first regulon is used for all original audio data according to the described target channel of described volume gain coefficient adjustment.
10. digital TV terminal as claimed in claim 8 is characterized in that, described sampling module comprises:
The second sampling unit is for the cycle digital sample that the original audio data of the described target channel of buffer memory is carried out described T1 duration take described T1 duration as the cycle;
Described design factor module comprises:
The second computing unit is used for calculating according to the loudness value that sound intensity value corresponding to the digital sample information of described T1 duration and described user set in advance the volume gain coefficient corresponding to digital sample information of described T1 duration;
Described adjustment module comprises:
The second regulon is used for the original audio data according to T1 duration corresponding to the digital sample information of the described T1 duration of the described target channel of described volume gain coefficient adjustment.
11. digital TV terminal as claimed in claim 9 is characterized in that, described digital TV terminal also comprises:
The first judge module is used for judging whether the described volume gain coefficient that target channel described in the reading database is corresponding;
Upgrade database module, be used for when being judged as described volume gain coefficient corresponding to target channel described in the reading database not, notify the first sampling unit the original audio data of the target channel of buffer memory to be carried out the digital sample of a described T1 duration, notice is calculated the loudness value module according to the digital sample information processing acquisition sound intensity value of described T1 duration, notify the first computing unit to calculate volume gain coefficient corresponding to described target channel according to the loudness value that sound intensity value corresponding to the digital sample information of described T1 duration and described user set in advance, upgrade described volume gain coefficient corresponding to target channel described in the described database, notify the first regulon all original audio data according to the described target channel of described volume gain coefficient adjustment, and the voice data of the described target channel after the notice output module output adjusting;
Read module, be used for when being judged as described volume gain coefficient corresponding to target channel described in the reading database, read described volume gain coefficient corresponding to target channel described in the described database, notify the first regulon all original audio data according to the described target channel of described volume gain coefficient adjustment, and the voice data of the described target channel after the notice output module output adjusting.
12. digital TV terminal as claimed in claim 8 is characterized in that, described digital TV terminal comprises:
Calculated difference value module is used for calculating the difference value between the loudness value that described sound intensity value and described user set in advance;
The second judge module is used for judging that described difference value is whether in the difference value scope that allows;
When described difference value was not in the difference value scope in described permission, notice design factor module calculated the volume gain coefficient according to the loudness value that described sound intensity value and user set in advance.
13. digital TV terminal as claimed in claim 9 is characterized in that, described sampling module comprises:
Divide the frequency range unit, be used for according to the perceived audio frequency range of people's ear and people's ear the susceptibility of described audio frequency being divided into a plurality of frequency ranges with described audio frequency, adopt different sample rates described original audio data to be carried out the digital sample of described T1 duration according to different described frequency ranges.
14. digital TV terminal as claimed in claim 13 is characterized in that, described adjustment module comprises:
The amplitude adjusted unit is according to the amplitude of the whole described original audio data of described volume gain coefficient adjustment or regulate separately voice data after the adjusting of the amplitude of original audio data of each described frequency range that described division obtains and each described frequency range of aliasing.
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| CN201210422905.9A CN102946520B (en) | 2012-10-30 | 2012-10-30 | A kind of method automatically controlling frequency channel volume and digital TV terminal |
| PCT/CN2012/086009 WO2014067206A1 (en) | 2012-10-30 | 2012-12-06 | Method for automatically controlling channel volume, and digital television terminal |
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