CN102025946B - Volume control method and digital television all-in-one machine utilizing same - Google Patents
Volume control method and digital television all-in-one machine utilizing same Download PDFInfo
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Abstract
The invention is suitable of the technical field of digital televisions and provides a volume control method and a digital television all-in-one machine utilizing the same. The method comprises the following steps of: a, receiving a channel switching command; if so, going to the step b; if not, going to the step c; b, calculating a difference value between a volume loudness value of a current channel and the volume loudness value of a channel before switching, and adjusting a sound gain value of the current channel according to the difference value; and c, calculating the difference value between the volume loudness value of a currently displaying audio frame and the volume loudness value of the previous audio frame, and adjusting the sound gain value of the currently displaying audio frame according to the difference value. The technical scheme provided in the invention ensures that the digital television all-in-one machine can automatically adjust the volume loudness difference whenthe channel is switched or a program is inter-cut, the availability of a product is enhanced, and better use experience is provided to users.
Description
Technical field
The invention belongs to the digital television techniques field, relate in particular to a kind of method for controlling volume and adopt the digital TV integrated machine of the method.
Background technology
At present, along with the development of television industries, universal along with Digital Television especially, the channel that TV can be watched gets more and more.The method of programming due to each TV station is different, volume during such as coding does not have unified standard, therefore can appear at when switching between different channel, channel sound new after switching can become suddenly large, it is large that the sound that perhaps breaks for commercialsy during broadcast program becomes suddenly, especially within the more quiet period at night, the unexpected variation of this sound is more obvious, and this has brought certain puzzlement for user's use.
For simulated television, because the loud I of simulation is directly to judge from signal amplitude, therefore general television set chip has AVC (automatic sound control) function, AVC is according to the voice signal amplitude of input, the automatic equalization wave volume, and digital TV integrated machine can't judge by signal amplitude the volume of current channel/program because entering the signal of chip is digital signal, and therefore above method is inapplicable.
Existing digital TV set-top box is by send the method for the privately owned descriptor of volume in TS (transport stream), come the volume between balanced different channel to change suddenly, this method is not to describe the volume of sound itself, therefore can't process the sound sudden change that causes because break for commercialsy in same channel.The method that sends in addition the privately owned descriptor of volume in TS stream is not that standard defines, but self-defining by each operator, and when set-top box customizes specific implementation, this is feasible in main set-top box market of calling for bid to sell by operator.And digital TV integrated machine orients towards the whole country, sell in the retail market, and there are hundreds of operators in the whole nation, therefore can not use the method for this customization.
Therefore, be necessary to provide a kind of technical scheme, can realize that digital TV integrated machine can adjust the sound of different channel/program, occur with the situation that prevents the sound sudden change.
Summary of the invention
The object of the present invention is to provide the digital TV integrated machine of a kind of method for controlling volume and employing the method, be intended to solve the self-adjusting problem of digital TV integrated machine volume.
The present invention is achieved in that a kind of method for controlling volume, and described method comprises:
A, receive channel switching instruction? if so, turn step b, otherwise turn step c;
Before b, the volume loudness value of calculating current channel and switching, the difference of the volume loudness value of channel, adjust the sound yield value of current channel according to described difference;
The difference of the volume loudness value of c, the volume loudness value of calculating current audio plays frame and a upper audio frame is adjusted the sound yield value of described current audio plays frame according to described difference.
Wherein step b specifically comprises:
B1, the voice data of described current channel is decoded, obtain the volume loudness value of described current channel;
The difference of the volume loudness value of channel before b2, the volume loudness value of calculating described current channel and switching, with described absolute difference and default threshold ratio, if described absolute difference is greater than described threshold value, the sound yield value of the front channel of described switching is deducted value after described difference as the sound yield value after adjusting.
Wherein also comprise before step b after step a:
Voice data to channel before described switching is decoded, and obtains volume loudness value and the sound yield value of the front channel of described switching.
Wherein step c specifically comprises:
C1, described current audio plays frame is decoded, obtain the volume loudness value of described current audio plays frame;
The difference of the volume loudness value of c2, the volume loudness value of calculating described current audio plays frame and a upper audio frame, with described absolute difference and default threshold ratio, if described absolute difference is greater than described threshold value, the sound yield value of a described upper audio frame is deducted value after described difference as the sound yield value after adjusting.
Wherein also comprise before step c after step a:
A described upper audio frame is decoded, obtain volume loudness value and the sound yield value of a described upper audio frame.
The present invention also provides a kind of digital TV integrated machine, and described digital TV integrated machine comprises audio decoder module, MCU, control signal receiver module, memory and sound gain control module, wherein:
Described control signal receiver module is used for receiving the channel switching controls instruction of user's input, and the channel switching controls command that receives is arrived described MCU;
Described audio decoder module is used for audio code stream is resolved, therefrom parse the volume loudness value of channel before switching and the volume loudness value of sound yield value and current channel, and the volume loudness value of channel before described switching and the volume loudness value of sound yield value and current channel are transferred to described MCU;
Described MCU is used for according to described channel switching instruction, calculate the volume loudness value of described current channel and the difference of the volume loudness value of switching front channel, according to the sound yield value of the described current channel of sound yield value calculative determination of channel before described difference and described switching, the sound yield value of described current channel is transferred to described sound gain control module;
Described sound gain control module is used for according to the sound gain of the described digital TV integrated machine of sound yield value control of the current channel of described MCU transmission;
Described memory is used for storing volume loudness value and the sound yield value of the front channel of described switching, calls for described MCU.
More specifically, described MCU comprises audio parameter value receiver module, audio parameter value comparison module, sound gain calculation module and the sound gain output module that connects successively, wherein:
Described audio parameter value receiver module is used for receiving volume loudness value and the sound yield value of the front channel of described switching, volume loudness value and the sound yield value of channel before described switching are transferred to memory stores, and be used for receiving the volume loudness value of described current channel, the volume loudness value of described current channel is transferred to described audio parameter value comparison module;
Described audio parameter value comparison module is used for calling the volume loudness value of channel before described switching from memory, the volume loudness value of channel before described switching and the volume loudness value of current channel are compared, calculate the volume loudness value of described current channel and the difference of the volume loudness value of switching front channel, described difference is transferred to described sound gain calculation module;
The sound yield value of channel before described sound gain value computation module is used for calling from memory and switches, the value that the sound yield value of the front channel of described switching is deducted after described difference is transferred to described sound gain output module as the sound yield value of described current channel;
Described sound gain output module is used for to the sound yield value of the described current channel of described sound gain control module output.
More specifically, described audio parameter value comparison module also be used for the volume loudness value of described current channel with switch before channel the volume loudness value difference and default threshold ratio, if both differences are greater than default threshold value, the difference with both is transferred to described sound gain calculation module.
More specifically, described audio decoder module also is used for audio frame is resolved, therefrom parse the volume loudness value of an audio frame and the volume loudness value of sound yield value and current audio plays frame, and the volume loudness value of a described upper audio frame and the volume loudness value of sound yield value and current audio plays frame are transferred to described MCU;
Described MCU also calculates the difference of the volume loudness value of the volume loudness value of described current audio plays frame and a upper audio frame, according to the sound yield value of the described current audio plays frame of sound yield value calculative determination of described difference and a described upper audio frame, the sound yield value of described current audio plays frame is transferred to described sound gain control module;
Described sound gain control module is used for according to the sound gain of the described digital TV integrated machine of sound yield value control of the current audio plays frame of described MCU transmission;
Described memory is used for storing volume loudness value and the sound yield value of a described upper audio frame, calls for described MCU.
More specifically, described MCU comprises audio parameter value receiver module, audio parameter value comparison module, sound gain calculation module and the sound gain output module that connects successively, wherein:
Described audio parameter value receiver module is used for receiving volume loudness value and the sound yield value of a described upper audio frame, volume loudness value and the sound yield value of a described upper audio frame are transferred to memory stores, and be used for receiving the volume loudness value of described current audio plays frame, the volume loudness value of described current audio plays frame is transferred to described audio parameter value comparison module;
Described audio parameter value comparison module is used for calling the volume loudness value of a described upper audio frame from memory, the volume loudness value of a described upper audio frame and the volume loudness value of current audio plays frame are compared, calculate the difference of the volume loudness value of the volume loudness value of described current audio plays frame and a upper audio frame, described difference is transferred to described sound gain calculation module;
Described sound gain value computation module is used for calling the sound yield value of a upper audio frame from memory, the value that the sound yield value of a described upper audio frame is deducted after described difference is transferred to described sound gain output module as the sound yield value of described current audio plays frame;
Described sound gain output module is used for to the sound yield value of the described current audio plays frame of described sound gain control module output.
The present invention overcomes the deficiencies in the prior art, when the user changes the platform operation, volume loudness value and the sound yield value of channel before system log (SYSLOG) switches, and obtain switch after the volume loudness value of channel (current channel), sound intensity value before and after channel is switched compares, determine whether that according to comparative result needs adjust the sound yield value that switches rear channel, balanced with the volume that realizes changing before and after platform; Watch in the process of program the user, the volume loudness value of the current audio plays frame of system acquisition (next audio frame), the volume loudness value of the upper audio frame of the volume loudness value of current audio plays frame and record is compared, determine whether that according to comparative result needs adjust the yield value of current audio plays frame, to realize the equilibrium of same channel voice output.Technical scheme provided by the invention makes digital TV integrated machine when channel switching or program interruption, can automatically adjust for the volume loudness differences, can prevent the obvious loudness differences switching and disturb the people during program interruption at channel, thereby make digital TV integrated machine voice output when channel switching and program interruption be consistent, improve the availability of product, made the user have better experience.
Description of drawings
Fig. 1 is the digital TV integrated machine theory diagram of the embodiment of the present invention;
Fig. 2 is the schematic diagram of the digital TV integrated machine MCU of the embodiment of the present invention;
Fig. 3 is the flow chart of the embodiment of the present invention.
Embodiment
Technical scheme provided by the invention is: when the user changes the platform operation, volume loudness value and the sound yield value of channel before system log (SYSLOG) switches, and obtain switch after the volume loudness value of channel (current channel), sound intensity value before and after channel is switched compares, determine whether that according to comparative result needs adjust the sound yield value that switches rear channel, balanced with the volume that realizes changing before and after platform; Watch in the process of program the user, the volume loudness value of the current audio plays frame of system acquisition (next audio frame), the volume loudness value of the upper audio frame of the volume loudness value of current audio plays frame and record is compared, determine whether that according to comparative result needs adjust the yield value of current audio plays frame, to realize the equilibrium of same channel voice output.
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
The schematic diagram of the digital TV integrated machine that the embodiment of the present invention provides comprises audio decoder module, MCU (microprocessor), remote control reception module, memory and sound gain control module as shown in Figure 1.
Wherein: the remote control reception module is connected with MCU, is used for receiving the remote signal that the user sends by remote controller, demodulates remote control coding from the remote signal that receives, and the remote control coding that demodulates is transferred to MCU; In the embodiment of the present invention, the user can change the platform operation by remote controller; During specific implementation, the user can also realize changing the platform operation by the button on the television set control panel except realizing changing the platform operation by remote controller;
The audio decoder module is connected with MCU, be used for audio code stream is resolved, therefrom parse the audio parameter value, as switch volume loudness value and the sound yield value of front channel, the volume loudness value of channel after switching, the volume loudness value of the volume loudness value of a upper audio frame and sound yield value and current audio plays frame, and the audio parameter value that parses is transferred to MCU;
MCU is connected with memory, is used for the remote control coding of remote control reception module transmission is resolved, and controls the operation of each correlation function module according to analysis result; Volume loudness value and sound yield value as channel before switching store memory into, the volume loudness value of channel before switching and the volume loudness value of the rear channel of switching are compared, if both differences exceed default threshold value, according to both differences, the sound yield value is adjusted, the sound yield value after adjusting is transferred to the sound gain control module; Store the volume loudness value of the upper audio frame of audio frequency parsing module transmission and the volume loudness value of sound yield value into memory, the volume loudness value of current audio plays frame and the volume loudness value of a upper audio frame are compared, if both differences exceed default threshold value, according to both differences, the sound yield value is adjusted, the sound yield value after adjusting is transferred to the sound gain control module;
Memory is connected with MCU, is used for volume loudness value and the sound yield value of channel before bank switching, the volume loudness value of previous frame audio frequency and sound yield value;
The sound gain control module is connected with MCU, is used for gain according to the sound yield value control figure TV integrated machine power amplifier chips after the adjustment of MCU transmission.
Specifically, the theory diagram of MCU comprises the audio parameter value receiver module, audio parameter value comparison module, sound gain calculation module and the sound gain output module that connect successively as shown in Figure 2.Wherein: audio parameter value receiver module is connected with memory, be used for receiving volume loudness value and the sound yield value of channel before switching, volume loudness value and the sound yield value of channel before switching are transferred to memory stores, and be used for receiving the volume loudness value of switching rear channel, the volume loudness value transmission audio parameter value comparison module of channel after switching; Audio parameter value comparison module is connected with memory, be used for calling the volume loudness value of channel before switching from memory, the volume loudness value of channel before switching is compared with the volume loudness value of switching rear channel, and be used for both difference and default threshold ratio, if both differences are greater than default threshold value, the difference with both is transferred to the sound gain calculation module; The sound gain value computation module is connected with memory, be used for calling the sound yield value of channel before switching from memory, according to the volume loudness value of switching front channel with switch after the difference of volume loudness value of channel the sound yield value that switches front channel is adjusted, the sound yield value after adjusting is transferred to the sound output module that gains as the sound yield value of current channel; Sound gain output module is used for to power amplifier chips output sound yield value.Before supposing to switch, the volume loudness value of channel is Lo1, before switching, the sound yield value of channel is Go1, after switching, the volume loudness value of channel is Ln1, if the absolute difference of Ln1-Lo1 is greater than default threshold value, the sound yield value Gn1=Go1+ (Lo1-Ln1) after adjustment.
In addition, do not carry out the channel handover operation the user, during the program of the some channels of television set normal play, audio parameter value receiver module also is used for receiving volume loudness value and the sound yield value of an audio frame, volume loudness value and the sound yield value of previous frame audio frequency are transferred to memory stores, and be used for receiving the volume loudness value of current audio plays frame, the volume loudness value of current audio frame is transferred to audio parameter value comparison module; Audio parameter value comparison module is connected with memory, be used for calling the volume loudness value of a upper audio frame from memory, the volume loudness value of a upper audio frame and the volume loudness value of current audio plays frame are compared, and be used for both difference and default threshold ratio, if both differences are greater than default threshold value, the difference with both is transferred to the sound gain calculation module; The sound gain value computation module is connected with memory, be used for calling the sound yield value of previous frame audio frequency from memory, according to the difference of the volume loudness value of the volume loudness value of previous frame audio frequency and current audio plays frame, the sound yield value of a upper audio frame is adjusted, the sound yield value after adjusting is transferred to sound gain output module as the sound yield value of current audio plays frame; Sound gain output module is used for to power amplifier chips output sound yield value.If the volume loudness value of a upper audio frame is Lo2, the sound yield value of a upper audio frame is Go2, the volume loudness value of current audio plays frame is Ln2, if the absolute difference of Ln2-Lo2 is greater than default threshold value, the sound yield value Gn2=Go2+ (Lo2-Ln2) after adjustment.
Embodiment of the present invention flow chart specifically comprises following step as shown in Figure 3:
1, beginning flow process;
2, receive channel switching instruction? if so, turn step 3, otherwise turn step 9;
Volume loudness value Lo1 and the sound yield value Go1 that 3, will switch front channel store memory into;
4, obtain the volume loudness value Ln1 that switches rear channel;
5, calculate the absolute difference of Ln1-Lo1, and and the threshold ratio of systemic presupposition;
6, is the absolute difference of Ln1-Lo1 greater than threshold value? if so, turn step 7, otherwise turn step 8;
7, the sound yield value Gn1=Go1+ (Lo1-Ln1) after adjustment of calculating, and the sound yield value Gn1 after adjusting is set in power amplifier chips;
8, keep sound yield value Go1 constant.
9, volume loudness value Lo2 and the sound yield value Go2 with a upper audio frame stores memory into;
10, next audio frame is decoded, obtain the volume loudness value Ln2 of current audio plays frame;
11, calculate the absolute difference of Ln2-Lo2, and and the threshold ratio of systemic presupposition;
12, is the absolute difference of Ln2-Lo2 greater than threshold value? if so, turn step 13, otherwise turn step 14;
13, the sound yield value Gn2=Go2+ (Lo2-Ln2) after adjustment of calculating, and the sound yield value Gn2 after adjusting is set in power amplifier chips;
14, keep sound yield value Go2 constant.
During specific implementation technical scheme provided by the invention, can be by predetermined threshold value be arranged to realize the self-adjusting sensitivity of technical solution of the present invention volume, when the predetermined threshold value setting is larger, when the volume loudness value before and after switching differs greatly, system just can adjust the sound yield value, if the predetermined threshold value setting is less when being even zero, as long as before and after switching, volume loudness value difference is less when even some difference being arranged, system all can adjust the sound yield value.
The above is only preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. method for controlling volume, described method comprises:
A, judge whether to receive channel switching instruction, if so, turn step b, otherwise turn step c;
B, the voice data of described current channel is decoded, obtain the volume loudness value of described current channel, calculate the volume loudness value of described current channel and the difference of the volume loudness value of switching front channel, with described absolute difference and default threshold ratio, if described absolute difference is greater than described threshold value, the sound yield value of the front channel of described switching is deducted value after described difference as the sound yield value after adjusting;
C, described current audio plays frame is decoded, obtain the volume loudness value of described current audio plays frame, calculate the difference of the volume loudness value of the volume loudness value of described current audio plays frame and a upper audio frame, with described absolute difference and default threshold ratio, if described absolute difference is greater than described threshold value, the sound yield value of a described upper audio frame is deducted value after described difference as the sound yield value after adjusting.
2. method according to claim 1, is characterized in that, wherein also comprises before step b after step a:
Voice data to channel before described switching is decoded, and obtains volume loudness value and the sound yield value of the front channel of described switching.
3. method according to claim 1, is characterized in that, wherein also comprises before step c after step a:
A described upper audio frame is decoded, obtain volume loudness value and the sound yield value of a described upper audio frame.
4. a digital TV integrated machine, is characterized in that, described digital TV integrated machine comprises audio decoder module, MCU, control signal receiver module, memory and sound gain control module, wherein:
Described control signal receiver module is used for receiving the channel switching controls instruction of user's input, and the channel switching controls command that receives is arrived described MCU;
Described audio decoder module is used for audio code stream is resolved, therefrom parse the volume loudness value of channel before switching and the volume loudness value of sound yield value and current channel, and the volume loudness value of channel before described switching and the volume loudness value of sound yield value and current channel are transferred to described MCU;
Described MCU is used for according to described channel switching instruction, calculate the volume loudness value of described current channel and the difference of the volume loudness value of switching front channel, with the volume loudness value of described current channel with switch before channel the volume loudness value difference and default threshold ratio, in both difference during greater than default threshold value, the sound yield value of the front channel of described switching is deducted value after described difference as the sound yield value of described current channel, and the sound yield value of described current channel is transferred to described sound gain control module;
Described sound gain control module is used for according to the sound gain of the described digital TV integrated machine of sound yield value control of the current channel of described MCU transmission;
Described memory is used for storing volume loudness value and the sound yield value of the front channel of described switching, calls for described MCU.
5. digital TV integrated machine according to claim 4, is characterized in that, described MCU comprises audio parameter value receiver module, audio parameter value comparison module, sound gain calculation module and the sound gain output module that connects successively, wherein:
Described audio parameter value receiver module is used for receiving volume loudness value and the sound yield value of the front channel of described switching, volume loudness value and the sound yield value of channel before described switching are transferred to memory stores, and be used for receiving the volume loudness value of described current channel, the volume loudness value of described current channel is transferred to described audio parameter value comparison module;
Described audio parameter value comparison module is used for calling the volume loudness value of channel before described switching from memory, the volume loudness value of channel before described switching and the volume loudness value of current channel are compared, calculate the volume loudness value of described current channel and the difference of the volume loudness value of switching front channel, described difference is transferred to described sound gain calculation module;
The sound yield value of channel before described sound gain value computation module is used for calling from memory and switches, the value that the sound yield value of the front channel of described switching is deducted after described difference is transferred to described sound gain output module as the sound yield value of described current channel;
Described sound gain output module is used for to the sound yield value of the described current channel of described sound gain control module output.
6. digital TV integrated machine according to claim 5, it is characterized in that, described audio parameter value comparison module also be used for the volume loudness value of described current channel with switch before channel the volume loudness value difference and default threshold ratio, if both differences are greater than default threshold value, the difference with both is transferred to described sound gain calculation module.
7. digital TV integrated machine according to claim 4, it is characterized in that, described audio decoder module also is used for audio frame is resolved, therefrom parse the volume loudness value of an audio frame and the volume loudness value of sound yield value and current audio plays frame, and the volume loudness value of a described upper audio frame and the volume loudness value of sound yield value and current audio plays frame are transferred to described MCU;
Described MCU also calculates the difference of the volume loudness value of the volume loudness value of described current audio plays frame and a upper audio frame, according to the sound yield value of the described current audio plays frame of sound yield value calculative determination of described difference and a described upper audio frame, the sound yield value of described current audio plays frame is transferred to described sound gain control module;
Described sound gain control module is used for according to the sound gain of the described digital TV integrated machine of sound yield value control of the current audio plays frame of described MCU transmission;
Described memory is used for storing volume loudness value and the sound yield value of a described upper audio frame, calls for described MCU.
8. digital TV integrated machine according to claim 7, is characterized in that, described MCU comprises audio parameter value receiver module, audio parameter value comparison module, sound gain calculation module and the sound gain output module that connects successively, wherein:
Described audio parameter value receiver module is used for receiving volume loudness value and the sound yield value of a described upper audio frame, volume loudness value and the sound yield value of a described upper audio frame are transferred to memory stores, and be used for receiving the volume loudness value of described current audio plays frame, the volume loudness value of described current audio plays frame is transferred to described audio parameter value comparison module;
Described audio parameter value comparison module is used for calling the volume loudness value of a described upper audio frame from memory, the volume loudness value of a described upper audio frame and the volume loudness value of current audio plays frame are compared, calculate the difference of the volume loudness value of the volume loudness value of described current audio plays frame and a upper audio frame, described difference is transferred to described sound gain calculation module;
Described sound gain value computation module is used for calling the sound yield value of a upper audio frame from memory, the value that the sound yield value of a described upper audio frame is deducted after described difference is transferred to described sound gain output module as the sound yield value of described current audio plays frame;
Described sound gain output module is used for to the sound yield value of the described current audio plays frame of described sound gain control module output.
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| CN102025946A (en) | 2011-04-20 |
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