CN101383928B - Stereo control method and television applying the method - Google Patents
Stereo control method and television applying the method Download PDFInfo
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- CN101383928B CN101383928B CN2008101385186A CN200810138518A CN101383928B CN 101383928 B CN101383928 B CN 101383928B CN 2008101385186 A CN2008101385186 A CN 2008101385186A CN 200810138518 A CN200810138518 A CN 200810138518A CN 101383928 B CN101383928 B CN 101383928B
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Abstract
The invention provides an NICAM control method applicable for digital telecom signal with accompanying sound language, which comprises steps of switching a channel, reading the accompanying sound language state of the channel, wherein the accompanying sound language state indicates language type preferentially to be output; controlling to output the sound corresponding to the language type preferentially to be output according to the accompanying sound language state of the channel; if the NICAM control instruction of a user is received, controlling to output the sound according to the NICAM control instruction of the user and modifying the accompanying sound language state of the channel according to the NICAM control instruction of the user. The NICAM control method stores the accompanying sound language state of each channel and controls the accompanying sound output of a television through reading the stored accompanying sound language state when the television is switched to a new channel, and is convenient for the use of the user.
Description
Technical field
The present invention relates to a kind of beautiful sound controlling method and use the television set of this method, relate to more specifically and a kind ofly can control the beautiful sound controlling method of each channel and the television set of this method of application respectively.
Background technology
Along with the continuous development of TV tech, television product miscellaneous arises at the historic moment, and the user is also more and more higher for the requirement of audio frequency.Be needs and the raising television audio quality that adapts to the broadcast television technique development, former Ministry of Radio Film and TV has issued GY/T129 in December, 1997---1997 " the PAL-D television broadcasting adds dual track digital sound technical specification ", and come into effect in May, 1998.In fact this standard is exactly the standard of the beautiful system for electrical teaching of Chinese TV, and at present, domestic existing how tame TV station broadcasts stereo and bilingual program by beautiful system for electrical teaching.
What Television Digital sound accompaniment broadcasting was adopted is " nearly instantaneous companding audio-frequency multiplex " (Near-INSTANTANEOUSLY COMPANDED AUDIO MuiitipIex) technology, is abbreviated as that " NICAM, the Chinese transliteration is " beautiful sound " technology." beautiful sound " technology is used for terrestrial broadcasting by the developmental research success of Britain BBC broadcaster, also can be used for satellite television broadcasting." beautiful sound " technology has the incomparable advantage of simulated television sound, promptly in the NICAM passage, can transmit stereophonic program, also can transmit bilingual program, can also transmit digital information; Advantages such as the sound dynamic range that " beautiful sound " technology also has transmission is big, tonequality good, signal to noise ratio is high, cross-talk is little.Therefore, " beautiful sound " Study on Technology success is used widely very soon, in West Europe, some countries and regions such as Northern Europe, Southeast Asia and Hong Kong have carried out the NICAM broadcasting service in succession.The same with common TV broadcasting, the carrier frequency difference because of sound accompaniment has different standards.Some TV stations of China have begun or have actively prepared to carry out the NICAM digital sound broadcasting of PAL-D system.
NICAM signal forming process is roughly as follows: by A and B two independent voice signal or the input of stereosonic left and right sides two paths of signals, at first through press the preemphasis network processing of CCITT J17 regulation, its objective is the noise that produces in the A/D conversion carried out after being reduced in and the TV recovery process.The frequency spectrum that produces when avoiding the taking a sample aliasing of turning back, two paths of signals passes through the 15kHz low pass filter again separately, two paths of signals is sent into the A/D converter, in conversion process, sampling frequency with 32kHz, its bandwidth can reach 16kHz, produce the sound sampling binary data of 14bit, these data are delivered to compressor reducer again figure place are compressed to 10bit, and then add altogether 11bit of 1bit parity check bit (, and correctly recovering primary signal) so that in the decoder of television receiver, can check mistake.For preventing to disturb and improve the stability of system, the influence that the multidigit error code causes the biography data appears in minimizing, and data-signal is imposed " bit interweaves " processing, just original data code sequence is upset, and rearranges by certain rule again.Like this through interweaving, even in transmission and receiver, produce some continuous mistake, in decoder, recover original data sequence through interleaving treatment, these error codes will be distributed in the different sampling values and go, thereby the probability that occurs a plurality of mistakes in the sample value is greatly descended, improved the anti-error code capacity of signal.For reducing of the interference of digital sound signal modulated carrier energy to FM analoging sound signal and picture signal, also to carry out scrambler to the data flow after interweaving and handle, add the data flow of pseudo-random binary to staggered data.Before modulating, form filter through frequency spectrum again.As everyone knows, according to the fourier series theory analysis, the impulse wave of a rectangle, it is made up of countless sine waves, before the modulation, must be limited in these harmonic waves in a certain scope, therefore the pulse signal of scrambler must be formed filter through frequency spectrum, this filter is certain bell state.PAL-D system NICAM digital sound adopts 40% cosine roll off mode filter.PAL-I system ICA digital sound adopts 100% cosine roll off; PAL-B/G system NICAM digital sound adopts 40% cosine roll off.So far having finished the pulse digit cataloged procedure, is modulation afterwards.In order to save frequency bandwidth, adopt difference quadrature phase shift keying (DQPSk) digital modulation mode, finish the signal after the quadrature modulation, by the outer interference signal of band pass filter filtering band, and adjust amplitude according to picture level, send into the intermediate frequency synthesizer, finish synthetic with image, FM sound intermediate frequency.The analog acoustic signal of modulation digital acoustical signal and frequency modulation and the picture signal of amplitude modulation are carried out addition, deliver to the RF transmitter and launch through antenna.
Television set receives the RF signal that has the NICAM digital sound signal, enters the accurate sound demodulation circuit that separates through tuner, and the digital carrier that obtains centre frequency after the demodulation and be 5.85MHz (PAL-D makes NICAM) is delivered to the digital sound passage.The digital sound passage comprises band pass filter, DQPSK demodulator, and the NICAM signal after the demodulation occurs with pulse-code modulation (PCM) data flow form, restores through scramble then, takes out the random data that adds from data flow.Then remove the staggered bit order of recovering according to the hypervisor of preserving in the memory, become 11 original words, and then the calibration coefficient of sending out the pass by data is extended to these words the form of 11 words, and on the basis of parity check bit, correct a mistake, can obtain the real time data stream of 14bit after the decoding, it contains the information of left and right sound channels or A and B sound channel.Utilize the D/A conversion, data mode is become analog form,, eliminate and disturb, through de-emphasis network (pressing the de-emphasis network of CCITT J17 regulation), draw original voice signal again, be added to audio-frequency power amplifier, to obtain the sound of high-quality through low pass filter.
At present, most television product all has beautiful sound function, and the television set of some outlet must have beautiful sound function according to the rules.Yet, the present television set with beautiful sound function exists not enough aspect beautiful sound control system, for example, some television set can automatically switch to the state of voice 1 when switching to a new channel, if voice 1 are not the voice that the user is accustomed to, the user needs manually sound accompaniment to be switched to the state of voice 2, and this changes platform for the user at every turn and all brings the trouble that is provided with.Though some television set can be in switching channels the automatic switchover voice status, but this can not deal with problems fully, for example current channel beautiful sound state is set is voice 2, if switch to new channel, when voice 2 were not the language of the desired uppick of user, the user still needed manually to adjust the sound accompaniment state.Therefore, this area needs a kind of more advanced beautiful sound controlling method to satisfy user's demand.
Summary of the invention
In order to address the above problem, the invention provides a kind of beautiful sound controlling method, this method is applicable to the digital telecommunication signal that has sound accompanying language, comprising:
Switching channels;
Read the sound accompanying language state of this channel, wherein, described sound accompanying language state indicates the category of language of preferential output;
Sound accompanying language State Control output sound according to this channel;
If receive user's beautiful sound control system instruction, then according to the sound of the category of language of user's the described preferential output of beautiful sound control system commands for controlling output correspondence, and according to the sound accompanying language state of beautiful this channel of sound control system instruction modification of user.
Described sound accompanying language state storage is in a specific memory space.
Further, the present invention also provides a kind of television set, this used as television has the digital television signal of sound accompanying language in broadcast, comprise audio input interface, audio frequency processing circuit, primary processor, memory, user's input interface and sound out-put circuit, audio input interface receives voice data and it is flowed to audio frequency processing circuit, audio frequency processing circuit decodes out with voice signal in the voice data and beautiful message breath, instruction according to primary processor, corresponding voice signal is flowed to sound out-put circuit, store the sound accompanying language state of each channel in the described memory, when television set switches to a new channel, primary processor reads the sound accompanying language state of this channel in the memory, wherein, described sound accompanying language state indicates the category of language of preferential output, exports the voice signal of the category of language of corresponding described preferential output according to described sound accompanying language State Control audio frequency processing circuit.
Described user's input interface is used to receive user's control command and sends it to primary processor, described control command comprises beautiful sound control system instruction, primary processor is on the one hand according to the output of described beautiful sound control system commands for controlling audio frequency processing circuit, on the other hand according to the described sound accompanying language state of described beautiful sound control system instruction modification.
Described memory can be stored two groups or more sound accompanying language state.
Described sound out-put circuit comprises power amplifier and loud speaker.
Beautiful sound controlling method of the present invention is by the sound accompanying language state of each channel of storage, when television set switches to a new channel, by the sound accompanying language state that reads storage the sound accompaniment output of television set is controlled, because these sound accompanying language states all are the settings when watching this channel before the user, general all is user's optimal selection, and like this, the sound of television set output is exactly that the user wishes uppick, thereby do not need the user to adjust, convenient for users to use.
Description of drawings
Figure 1 shows that a schematic diagram with television set of beautiful sound function.
Figure 2 shows that a theory diagram with television set of beautiful sound function.
Figure 3 shows that the schematic diagram of the embodiment of the television set of using beautiful sound controlling method of the present invention.
Figure 4 shows that the schematic diagram of the embodiment of beautiful sound controlling method of the present invention.
Embodiment
In order to make those skilled in the art person understand the present invention program better, and above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Figure 1 shows that a schematic diagram with television set of beautiful sound function.Television set 100 comprises display screen 190 and loud speaker 170, has beautiful sound function.During operate as normal, display screen 110 shows television image and the corresponding sound of television of loud speaker 170 broadcasts.Display screen 110 also can show some osd informations under certain situation, in order to the prompting user, be user-friendly to television set 100.Because television set 100 has beautiful sound function, so 170 of loud speakers can be play corresponding television field frame according to user's instruction.
Figure 2 shows that the theory diagram of television set 100.As shown in the figure, television set 100 comprises video input interface 110, video processing circuits 120, audio input interface 130, audio frequency processing circuit 140, primary processor 150, user's input interface 154, power amplifier 160, loud speaker 170, display driver circuit 180 and display screen 190.Video input interface 110 receives external data and it is flowed to video processing circuits 120 and carries out Video processing such as video decode, the processed video signal is transported to display driver circuit 180, display driver circuit 180 is that display screen 190 can the data presented form and be delivered to display screen 190 with the processed video conversion of signals, and display screen 190 shows for the user it to be watched.Audio input interface 130 receives the external audio data and it is flowed to audio frequency processing circuit 140, the voice data of 140 pairs of inputs of audio frequency processing circuit carries out processing such as audio decoder, voice signal in the voice data and relevant beautiful message breath are decoded out, decoded voice signal is flowed to power amplifier 160, power amplifier amplifies this audio signal, be delivered to loud speaker 170 and play, listen to for the user.User's input interface 154 is used to receive user's control command, and primary processor 150 receives these control commands television set 100 is controlled.Because television set 100 has beautiful sound function, may comprise the sound accompanying language state in user's the control command, primary processor 150 can be controlled audio frequency processing circuit 140 according to user's sound accompanying language state, exports corresponding voice signal according to user's instruction.Though television set 100 has beautiful sound function, but because its control for beautiful sound is determined by user's control command fully, when switching to a new channel at every turn, all may need the user manually to control beautiful sound, this can cause certain trouble to use of user.
Figure 3 shows that the schematic diagram of the embodiment of the television set of using beautiful sound controlling method of the present invention.As shown in the figure, television set 200 comprises video input interface 210, video processing circuits 220, audio input interface 230, audio frequency processing circuit 240, primary processor 250, memory 252, user's input interface 254, power amplifier 260, loud speaker 270, display driver circuit 280 and display screen 290.Video input interface 210 receives external data and it is flowed to video processing circuits 220 and carries out Video processing such as video decode, the processed video signal is transported to display driver circuit 280, display driver circuit 280 is that display screen 290 can the data presented form and be delivered to display screen 290 with the processed video conversion of signals, and display screen 290 shows for the user it to be watched.Audio input interface 230 receives the external audio data and it is flowed to audio frequency processing circuit 240, the voice data of 240 pairs of inputs of audio frequency processing circuit carries out processing such as audio decoder, voice signal in the voice data and relevant beautiful message breath are decoded out, instruction according to primary processor 250, corresponding voice signal is flowed to power amplifier 260, power amplifier amplifies this audio signal, is delivered to loud speaker 270 and plays, and listens to for the user.Different with television set 100, store the sound accompanying language state of each channel in the memory 252 in the television set 200, when television set 200 switches to a new channel, primary processor 250 reads the sound accompanying language state of this channel in the memory 252, the corresponding voice signal of control audio treatment circuit 240 outputs.User's input interface 254 is used to receive user's control command, and primary processor 250 receives these control commands television set 200 is controlled.If user's control command comprises the sound accompanying language state, 250 one side of primary processor on the other hand can being provided with the relevant position of sound accompanying language state storage to memory 254 according to the user according to the output of user's operational order control audio treatment circuit 240.Like this, when television set 200 switches to a new channel, primary processor 250 will read the sound accompanying language state of this channel in the memory 252, these sound accompanying language states all are the settings when watching this channel before the user, general all is user's optimal selection, and like this, the sound of loud speaker 270 outputs is exactly that the user wishes uppick, thereby do not need the user to adjust, convenient for users to use.In addition, can also store two groups or more sound accompanying language state in the memory 252, use different beautiful sound settings according to different situations to make things convenient for the user.For example, for the television set of Chinese, English bilingual sound, the user can be provided with two groups of beautiful sound settings, a kind of be Chinese preferential, a kind of be English preferential or the like.
Figure 4 shows that the schematic diagram of the embodiment of beautiful sound controlling method of the present invention.As shown in the figure, the beautiful sound controlling method of present embodiment may further comprise the steps:
Step 320: the sound accompanying language state that reads this channel;
Step 330: according to the sound accompanying language State Control output sound of this channel;
Step 340: judge whether to receive user's beautiful sound control system instruction,, then change step 310 over to if do not have;
Step 350:,, store the sound accompanying language state of this channel simultaneously then according to user's beautiful sound control system commands for controlling output sound if receive user's beautiful sound control system instruction.
Concrete, the sound accompanying language state here can be not quite similar according to the difference of TV signal and the difference of the function of television set own.When TV signal is analog signal, if current beautiful tone signal is bilingual signal---language and language 2, then this beautiful sound control system letter is the beautiful sound Language State of voice 1 or voice 2.The signal that this beautiful sound control system information can be a bit position.When TV signal is digital signal, this beautiful sound control system information sound accompanying language state that is current channel then.
In sum, beautiful sound controlling method of the present invention is by the sound accompanying language state of each channel of storage, when television set switches to a new channel, at first the sound accompaniment output of television set is controlled by the sound accompanying language state that reads storage, because these sound accompanying language states all are the settings when watching this channel before the user, general all is user's optimal selection, like this, the sound of television set output is exactly that the user wishes uppick, thereby do not need the user to adjust, convenient for users to use.
Certainly; above-mentioned explanation is not to be limitation of the present invention; the present invention also is not limited in above-mentioned giving an example, and variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present invention also should belong to protection scope of the present invention.
Claims (6)
1. a beautiful sound controlling method is characterized in that, is applicable to the digital television signal that has sound accompanying language, comprising:
Switching channels;
Read the sound accompanying language state of this channel, wherein, described sound accompanying language state indicates the category of language of preferential output;
Export the sound of the category of language of corresponding described preferential output according to the sound accompanying language State Control of this channel;
If receive user's beautiful sound control system instruction, then according to user's beautiful sound control system commands for controlling output sound, and according to the sound accompanying language state of beautiful this channel of sound control system instruction modification of user.
2. beautiful sound controlling method according to claim 1 is characterized in that: described sound accompanying language state storage is in a specific memory space.
3. television set, comprise audio input interface, audio frequency processing circuit, primary processor, memory, user's input interface and sound out-put circuit, audio input interface receives voice data and it is flowed to audio frequency processing circuit, audio frequency processing circuit decodes out with voice signal in the voice data and beautiful message breath, instruction according to primary processor, corresponding voice signal is flowed to sound out-put circuit, it is characterized in that: be used to play the digital television signal that has sound accompanying language, and store the sound accompanying language state of each channel in the described memory, when television set switches to a new channel, primary processor reads the sound accompanying language state of this channel in the memory, wherein, described sound accompanying language state indicates the category of language of preferential output, exports the voice signal of the category of language of corresponding described preferential output according to described sound accompanying language State Control audio frequency processing circuit.
4. television set according to claim 3, it is characterized in that: described user's input interface is used to receive user's control command and sends it to primary processor, described control command comprises beautiful sound control system instruction, primary processor is on the one hand according to the output of described beautiful sound control system commands for controlling audio frequency processing circuit, on the other hand according to the described sound accompanying language state of described beautiful sound control system instruction modification.
5. television set according to claim 3 is characterized in that: described memory can be stored two groups or more sound accompanying language state.
6. television set according to claim 3 is characterized in that: described sound out-put circuit comprises power amplifier and loud speaker.
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| TWI763159B (en) * | 2020-12-02 | 2022-05-01 | 瑞昱半導體股份有限公司 | Media playback apparatus and method having audio channel automatic selection mechanism |
| CN114615545A (en) * | 2020-12-09 | 2022-06-10 | 瑞昱半导体股份有限公司 | Media playing device and method with sound channel automatic selection mechanism |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005039639A (en) * | 2003-07-17 | 2005-02-10 | Sony Corp | Television broadcasting system and method, transmitter and method, and receiver and method |
| CN1708112A (en) * | 2004-06-08 | 2005-12-14 | 四川长虹电器股份有限公司 | Method for sorting and processing NIcam broadcasting signal in TV receiver |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005039639A (en) * | 2003-07-17 | 2005-02-10 | Sony Corp | Television broadcasting system and method, transmitter and method, and receiver and method |
| CN1708112A (en) * | 2004-06-08 | 2005-12-14 | 四川长虹电器股份有限公司 | Method for sorting and processing NIcam broadcasting signal in TV receiver |
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Address after: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No. Patentee after: Hisense Video Technology Co., Ltd Address before: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No. Patentee before: HISENSE ELECTRIC Co.,Ltd. |