CN101202870A - Audio data transmitting device and audio data receiving device - Google Patents
Audio data transmitting device and audio data receiving device Download PDFInfo
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- CN101202870A CN101202870A CNA2007101947259A CN200710194725A CN101202870A CN 101202870 A CN101202870 A CN 101202870A CN A2007101947259 A CNA2007101947259 A CN A2007101947259A CN 200710194725 A CN200710194725 A CN 200710194725A CN 101202870 A CN101202870 A CN 101202870A
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Abstract
When an unreceivable audio sampling frequency is transmitted from an audio data transmitting device or received at an audio data receiving device, frequency changing processing is executed inside an HDMI LSI of the transmitter side or the receiver side to change the unreceivable audio sampling frequency to a frequency that can be received at the audio data receiving device based on EDID information retained in the audio data receiving device, and mute processing of the audio information is executed to prevent generation of strange sounds.
Description
Technical field
The present invention relates to be used for the method and system of transmitting video data and audio-frequency information (audio clock packets of information and voice data), and relate to dispensing device and the receiving system that is used in this system.
Background technology
Recently, for from the video/audio data dispensing device such as DVD player to video/audio data receiving system transmitting video data such as the TV receiver and audio-frequency information (audio clock packets of information and voice data), use data communication according to HDMI (High Definition Multimedia Interface) (HDMI).Utilize HDMI, the authentication of the equipment of definition is performed in big bandwidth digital content protective system (HDCP), is used to protect the copyright of video data and audio-frequency information.
HDMI is the coffret that is used for multimedia AV equipment of new generation, and it is used for transmitting the signal of multiple digital AV household electrical appliance, the signal in for example digital TV, DVD burner, set-top box and other the digital AV product.HDMI is the transmission system of coming from the conventional transmission system development that video and audio frequency are separated, and it is to utilize the integrated signal multimedia interface of transmission of video and audio frequency simultaneously.HDMI can transmit the digital signal of a large amount of packings effectively by adopting compression-type high-resolution digital transfer of data not, and its peak transfer rate reaches per second 5G bit.Further, HDMI can export the digital of digital video data of DVI for example as outputting video signal.Further, it can transmit the audio signal of 8 channels simultaneously.HDMI is the multimedia terminal/interface with this good characteristic, and is indispensable one of digital product.
Or rather, HDCP be used to protect the video/audio data dispensing device of encrypting and transmitting content and receive and the video/audio data receiving system of decryption content between the standard of transmission content.Utilize HDCP, the video/audio data dispensing device is carried out authentication to the video/audio data receiving system, the content that the concurrent warp let-off is encrypted by utilizing authentication protocol.Device authentication among the HDCP is carried out by display data channel (DDC) communication, and wherein DDC communication is according to mutual integrated circuit (IIC).
But extending display identification data (EDID) information is as the information relevant with the equipment of opposite side among the HDMI, and it obtains by DDC communication.EDID information comprise with by the relevant facility information of the manageable signal type of HDMI, the information relevant with panel resolution rate and with relevant information such as pixel clock, the horizontal term of validity, the vertical term of validity, maximum output audio sample frequency.By carrying out DDC communication, the information of the equipment that opposite side links to each other can be introduced into.The details of EDID information is carried out to instruct in (VESA standard) at E-EDID description.
Fig. 1 illustrates the state that video/audio data dispensing device and video/audio data receiving system link to each other by the cable that meets HDMI.Video/audio data dispensing device Tx comprises DVD driver or CD driver (hereinafter being called driver) 13, HDMI LSI15 and B/ELSI (Back/End, i.e. back/end) 11.B/E LSI 11 comprises CPU.When sending by driver 13 from audio/video data that recording medium (DVD, CD etc.) obtains to the associated devices (voice data receiving system Rx) of HDMI LSI 15 and opposite side, CPU carries out control.Voice data dispensing device Tx links to each other by the HDMI cable with voice data receiving system Rx.Reference numeral 20 expression AV AMP 20 are used to reproduce the voice data from voice data dispensing device Tx output.AV AMP 20 links to each other by optical cable with voice data dispensing device Tx.
Voice data dispensing device Tx exports the voice data that is obtained from recording medium by B/E LSI 11 by using the voice band line such as I2s or SPDIF (light signal of IEC60958 standard) to HDMI LSI 15 and AV AMP 20.In video/audio data dispensing device Tx, HDMI LSI 15 is voice data and audio clock information package, and the data/bag of packing is sent to voice data receiving system Rx by the HDMI cable.Voice data receiving system Rx obtains the details about audio-frequency information, and wherein audio-frequency information receives from being arranged on the content that receives the bag.In this bag, be provided as the N of frequency division information and as the information of the so-called CTS of temporal information.HDMI (High Definition Multimedia Interface) specification version 1.3 has been described the details of voice data and audio clock information.In this part technological document, " audio sample bag " is corresponding to voice data, and " audio clock regeneration bag " is corresponding to the audio clock packets of information.
Can calculate audio sampling frequency Fs according to frequency division information N and temporal information CTS.Its computing formula can be shown in (1).
128×Fs＝Ft×N/CTS (1)
Here supposition is when video/audio data dispensing device Tx sends voice data, and frequency division information N and temporal information CTS are produced by B/E LSI 11." Ft " expression TMDS clock in the computing formula.
After frequency division information N and temporal information CTS (they are the relevant information of data sampling performed when producing voice data with video/audio data dispensing device Tx) were produced by B/E LSI 11, information N and CTS and voice data sent to video/audio data receiving system Rx from video/audio data dispensing device Tx.Video/audio data receiving system Rx judges audio sampling frequency Fs according to received frequency division information N and temporal information CTS.For example, situation about supposing is that TMDS clock Ft is 25.2MHz, and temporal information CTS is 25200.In this case, when voice data during with the audio sampling frequency Fs of 48kHz output, video/audio data dispensing device Tx frequency division information N is set to 6144.Further, when voice data during with the audio sampling frequency Fs of 96kHz output, video/audio data dispensing device Tx frequency division information N is set to 12288.Video/audio data receiving system Rx determines audio sampling frequency Fs based on frequency division information N that sends from video/audio data dispensing device Tx and temporal information CTS.Similarly, can adjust audio sampling frequency Fs by changing frequency division information N and temporal information CTS according to the variation among the TMDS clock Ft.
When voice data was input among the video/audio data dispensing device Tx by the SPDIF voice band line, HDMI LSI 15 changed the header packet information part according to voice data, so that audio sampling frequency Fs to be set.At this moment, HDMI LSI 15 is provided with the frequency division information N and the temporal information CTS of audio clock packets of information by using aforementioned calculation formula (1).Video/audio data receiving system Rx judges audio sampling frequency Fs based on received voice data and audio clock packets of information.Japan's publication file (the open 2005-65093 of Japanese unexamined patent publication No.) has been described the detailed content of audio sampling frequency Fs being judged by video/audio data receiving system Rx.
When voice data was input to video/audio data dispensing device Tx by the voice band line such as I2S, HDMI LSI 15 was provided with audio sampling frequency Fs by adding new packet header according to voice data.At this moment, HDMI LSI 15 is provided with the frequency division information N and the temporal information CTS of audio clock packets of information by using aforementioned calculation formula (1).Video/audio data receiving system Rx judges audio sampling frequency Fs based on received voice data and audio clock packets of information.
Suppose that present situation is that voice data utilizes light signal to export to the AV AMP 20 that links to each other with Tx by optical cable from video/audio data dispensing device Tx, has only vision signal to be output to the video/audio data receiving system Rx (TV machine etc.) that links to each other by the HDMI cable simultaneously.In this case, owing to have only single voice band line to be provided among the video/audio data dispensing device Tx, so the voice data that is provided with by B/E LSI 11 had not only outputed to as the AV AMP 20 of optical module but also outputed to HDMI LSI 15 as system configuration.At this moment, B/E LSI 11 has frequency division information N and temporal information under the stationary state simultaneously with audio data transmission to two object output.Therefore, when for example being set to 96kHz to AV AMP 20 outputting audio datas by audio sampling frequency Fs, voice data also outputs to video/audio data receiving system Rx with the audio sampling frequency Fs of 96kHz.But, video/audio data receiving system Rx (TV machine etc.) and 96kHz or higher audio sampling frequency Fs are incompatible, so that received voice data sends suddenly from video/audio data receiving system Rx as strange sound.
Summary of the invention
Therefore, main purpose of the present invention is by remaining on the generation that optimum value is avoided strange noise from the voice data of HDMI LSI output.
In order to realize aforementioned purpose, a kind of voice data dispensing device comprises:
Input unit, voice data are transfused to wherein;
Information acquisition device, it is used for obtaining the information relevant with its voice data disposal ability from the voice data receiving system, and wherein said voice data receiving system is the transmission sources that is imported into the described voice data of described input unit;
Analyzer, it is used to analyze the described information of being obtained by described information acquisition device;
The information adder, it is based on the result of the analysis of being carried out by described analyzer, generation is suitable for the header of the described voice data of described voice data receiving system, then consequent described header is added in the described voice data that is transfused to described input unit;
The packets of information generator, it is used to generate and be input to the described voice data corresponding audio clock information bag of described input unit; With
Output device, it is used for the data to described voice data receiving system output stack, and the data of this stack are by obtaining in the described voice data that is added with described header that described audio clock packets of information is added to.
In this structure, by selecting to reproduce clock according to the usable frequency of information (EDID information) the audio data receiving system relevant with the voice data disposal ability.When the voice data dispensing device linked to each other with the voice data receiving system, the information relevant with the voice data disposal ability of receiver side (EDID information) can read by the DDC line.Therefore, might read information such as the audio sampling frequency and the number of channel, that can handle by the voice data receiving system, and select suitable audio clock information bag.
A kind of like this form is arranged in the present invention: the voice data dispensing device further comprises modifier, and it will be arranged on the sample frequency that the sample frequency that is imported into the described voice data in the described input unit is suitable for described data sink instead.
Suppose that the audio sampling frequency of the voice data that sends from the voice data dispensing device can not handle at the voice data receiving system, might utilize this form so, the fixed value of half of original value, 1/3rd, the four/first-class or the audio sampling frequency that can be received by various voice data receiving systems is set to the audio sampling frequency that is provided with by the voice data dispensing device in advance.Then, the audio sampling frequency of voice data to be sent is adjusted to that value, and the voice data with the audio sampling frequency after the adjusting is sent to the voice data receiving system
A kind of like this form is arranged in the present invention: output device can limit the signal level of voice data to be exported.Utilize this structure, by after the audio sampling frequency of regulating voice data, sending voice data, regulate the signal level (for example, being adjusted to " 0 level ") of voice data to be sent then, may dually avoid the strange sound that produces in voice data receiving system side.
Input unit can be imported the voice data and the unpressed voice data of compression, as described voice data.The voice data of compression is the voice data of IEC50958/61937 standard; And unpressed voice data is the voice data that meets IEC60958 standard, I2S and left-justify form or Right Aligns form etc.
Utilize the above-mentioned structure that can import the voice data of compression, can be by the audio sampling frequency of header packet information being arranged to can being come transmitting audio data by the audio sampling frequency that the voice data receiving system is handled.Further, when the voice data receiving system can not be handled the voice data of compression, might come transmitting audio data by converting thereof into unpressed voice data.
Utilize the above-mentioned structure that can handle unpressed voice data, audio sampling frequency can be arranged to header packet information, then by the interpolation header packet information is come transmitting audio data.
By the output that can be stopped audio frequency clock information bag and voice data by the audio sampling frequency that the voice data receiving system is handled simultaneously is set.So by the output that can also further be stopped audio frequency clock information bag and voice data by the audio sampling frequency that the voice data receiving system is handled is set, information will never arrive the voice data receiving system.As a result, can dually avoid the generation of strange sound.
Might be by the output of the audio sampling frequency stop tone audio data that can be handled by the voice data receiving system be set.So, can be by being provided with by the audio sampling frequency of voice data receiving system processing and the output of further stop tone audio data, information will never arrive the voice data receiving system.As a result, can dually avoid the generation of strange sound.Further, the output of a stop tone audio data simply.So by an output of stop tone audio data, information will never arrive the voice data receiving system.As a result, can avoid the generation of strange sound.
Utilize the present invention, might come transmitting audio data by audio sampling frequency is set, wherein audio sampling frequency can be handled based on the information relevant with the voice data disposal ability of voice data receiving system (EDID information) by the voice data receiving system.This makes might avoid producing strange sound in the voice data receiving system.Further, become possibility, can improve the effect of avoiding producing strange sound by the signal level that makes restriction voice data to be exported.
The present invention can be applied to audio output device.Particularly, the present invention can be applied to AV equipment, for example has DVD player, DVD burner and the set-top box (STB) of AV output function.
Description of drawings
According to following description of preferred embodiments, other purpose of the present invention will become clear, and will be described in detail in appended claims.Those skilled in the art will understand of the present invention many advantages except describing here by specific implementation the present invention.
Fig. 1 is the diagrammatic sketch that is used to illustrate regular situation;
Fig. 2 is the diagrammatic sketch that is used to illustrate the embodiment of the invention;
Fig. 3 is the diagrammatic sketch that is used to illustrate regular situation;
Fig. 4 is used to illustrate EDID obtaining step of the present invention and the following down-sampled diagrammatic sketch that step is set;
Fig. 5 is used to illustrate the diagrammatic sketch that SPDIF of the present invention handles;
Fig. 6 is used to illustrate the diagrammatic sketch that I2S of the present invention handles;
Fig. 7 is the diagrammatic sketch that is used to illustrate the embodiment of receiver side of the present invention;
Fig. 8 is the diagrammatic sketch that is used to illustrate the embodiment that comprises sampling controller of receiver side;
Fig. 9 is the diagrammatic sketch that is used to illustrate up to the flow process of the present invention that obtains EDID information;
Figure 10 is used to illustrate the diagrammatic sketch that obtains EDID information flow process of the present invention afterwards;
Figure 11 A is the diagrammatic sketch that is used to illustrate the flow process that obtains EDID information regular situation afterwards;
Figure 11 B is used to illustrate the diagrammatic sketch according to the flow process of first embodiment of the invention that obtains after the EDID information;
Figure 11 C is used to illustrate the diagrammatic sketch according to the flow process of second embodiment of the invention that obtains after the EDID information;
Figure 12 A is used to illustrate the diagrammatic sketch according to the flow process of third embodiment of the invention that obtains after the EDID information;
Figure 12 B is used to illustrate the diagrammatic sketch according to the flow process of fourth embodiment of the invention that obtains after the EDID information;
Figure 12 C is used to illustrate the diagrammatic sketch according to the flow process of fifth embodiment of the invention that obtains after the EDID information;
Figure 13 is the diagrammatic sketch that is used to illustrate the handling process of receiver side; And
Figure 14 is the diagrammatic sketch that is used to illustrate the flow process of the present invention of receiver side.
Embodiment
Hereinafter, by being described in detail with reference to the attached drawings embodiment according to voice data dispensing device of the present invention and voice data receiving system.Fig. 2 is the block diagram that is used for illustrating according to the structure of the HDMI communication system sender side (voice data dispensing device) of embodiment, and wherein the HDMI communication system comprises digital transmission system and clock-generating device.
HDMI communication system shown in Figure 2 comprises as the video/audio data dispensing device 100 (DVD player etc.) of voice data dispensing device example with as the video/audio data receiving system 200 (TV receiver etc.) of voice data receiving system example.Video/audio data dispensing device 100 links to each other by HDMI cable 300 with video/audio data receiving system 200.
Video/audio data dispensing device 100 sends video data and voice data by HDMI cable 300 to video/audio data receiving system 200.Video/audio data dispensing device 100 is carried out by HDMI cable 300 and is communicated by letter with the DDC of video/audio data receiving system 200.Video/audio data dispensing device 100 uses DDC to communicate by letter to carry out device authentication to video/audio data receiving system 200 based on the HDCP standard.Video/audio data dispensing device 100 comprises HDMI LSI 101 and B/E LSI150.
B/E LSI 150 comprises the judgment means 151 of the control that is used to carry out whole video/voice data dispensing device.Video/audio data dispensing device 100 confirm with video/audio data receiving system 200 between be connected after, communicate by letter by DDC and to read EDID information from video/audio data receiving system 200.EDID information is read by the CPU I/F 132 that works together, block of registers 130, DDC I/F 131 and EDID ROM 202.Fig. 4 illustrates the details that EDID information reads processing.
Fig. 4 illustrates and is used for the handling process that reads EDID information and control audio sample frequency Fs by voice data dispensing device and voice data receiving system according to present embodiment.B/E LSI 150, judgment means 151, CPU I/F 132, block of registers 130, DDC I/F 131, HDMI cable 300, EDID ROM 202, clock information generator package 117, selector 114, decline sampling controller (down sampling controller) 116 and clock/voice data/dumb sound (mute) controller 118 wherein optionally are shown, and they read processing for EDID information and the Fs control and treatment plays an important role.
When 100 affirmations of video/audio data dispensing device were connected with video/audio data receiving system 200, judgment means 151 was carried out the processing of reading of EDID information.EDID information reads by (1) shown in Figure 4 → (2) → (3) → (4) → (5) → (4) → (3) → (2) → (1) processing procedure.This processing procedure will be described below.
At first, judgment means 151 is by the reading command of CPU I/F 132 to block of registers 130 transmission EDID information.Reading command is by the flow performing reading command of (1) shown in Figure 4 → (2) → (3).In case receive EDID information reading command, block of registers 130 is passed through HDMI cable 300 by the EDIDROM 202 acquisition EDID information of DDC I/F 131 from video/audio data receiving system 200 by DDC communication.EDID information obtains by the flow process of (4) shown in Figure 4 → (5) → (4).The EDID information that judgment means 151 among the B/E LSI 150 is obtained and kept being obtained by CPU I/F 132.EDID information keeps by the flow process of (3) shown in Figure 4 → (2) → (1).
EDID information comprises that the facility information relevant with utilizing the manageable signal type of HDMI, panel resolution information, pixel clock information, horizontal term of validity information, the vertically information etc. of term of validity information, maximal audio sample frequency Fs, and EDID information are the required information of control HDMI LSI 101.Judgment means 151 is based on each piece of EDID information Control that is kept, for example the clock information generator package 117 of HDMI LSI 101, information adder 113, selector 114, decline sampling controller 116 and clock/voice data/dumb sound controller 118.The control of each piece of flow performing by (1) shown in Figure 4 → (2) → (3) → (6).
Judgment means 151 is used to obtain also carry out the control of whole video/voice data dispensing device 100 control of EDID information except execution.Be written into video/audio data dispensing device 100 so that can reading of data the time at the recording medium such as CD or DVD, B/E LSI 150 obtains the video data and the voice data that are reproduced by DVD/CD.The B/ELSI 150 of video/audio data dispensing device 100 is that the data that obtained are provided with resolution information, colouring information, audio sampling frequency Fs information, channel information etc.These information wait based on the EDID information in the judgment means 151 of remaining on and are provided with.The video data that has been set up various information is transferred to HDMI LSI 101 from video Data Transmission line 154, and voice data is transferred to the equipment that the audio data transmission line is connected from audio data transmission line 152.Audio data transmission line 152 comprises I2S line and SPDIF line.The I2S line adopts left-justify (left-justified) data format or Right Aligns (right-justified) data format, utilizes these data formats, by exporting dateout synchronously with I2S or L-R clock.B/E LSI 150 sends voice data to the I2S of HDMI LSI input unit 112 and SPDIF input unit 111 respectively by circuit 152 (comprising I2S line and SPDIF line).
Block of registers 130 uses IIC communication and DDC Control on Communication to be used to obtain the action of EDID information.Further, the action of block of registers 130 control clock information generator packages 117, selector 114, decline sampling controller 116, clock/voice data/dumb sound controller 118 and video processing block 133.These actions are based on from the instruction of judgment means 151 and Be Controlled.
Audio frequency controll block 110 comprises SPDIF input unit 111, I2S input unit 112, carries out the decline sampling controller 116 of decline sampling processing, produces the clock information generator package 117 of audio clock packets of information and carries out voice data and the clock/voice data/dumb sound controller 118 of control of audio clock packets of information and dumb sound control.SPDIF input unit 111 and I2S input unit 112 receive voice data from B/E LSI 150.
The voice data that is transferred to SPDIF input unit 111 and I2S input unit 112 from B/E LSI 150 is by information adder 113 and selector 114 controls.Fig. 5 illustrates from B/E LSI 150 to selector the details of 114 SPDIF, and Fig. 6 illustrates from B/E LSI 150 to selector the details of 114 I2S.
Under the situation of SPDIF shown in Figure 5, voice data 510 is transferred to SPDIF input unit 111 from B/E LSI 150.In Fig. 5, " P.H " represents header packet information, and " DATA " expression audio frequency DATA information.When the voice data that transmits when judging 510 needed to change audio sampling frequency Fs and number of channel information etc., information adder 113 write " P.H 512 " on voice data 510, and it is as the header packet information of the number of channel and new audio sampling frequency Fs.Further, information adder 113 adds " HDMI.P.H 511 " in voice data 510, and it is as the header packet information in the HDML LSI 101.Then, information adder 113 transmits the voice data 510 (it is rewritten) that is added with " HDMI.P.H 511 " to selector 114, as voice data 514.When there is no need to change P.H, information adder 113 transmits the voice data 510 (it is not rewritten) that is added with " HDMI.P.H 511 " to selector 114, as voice data 513.
Under the situation that I2S shown in Figure 6 handles, voice data 610 is transferred to I2S input unit 112 from B/E LSI 150.In the processing of I2S, different with the situation of SPDIF is only to send the voice data that does not add package informatin usually.So in the processing of I2S, the I2S input unit is used to receive the voice data 610 that does not have header packet information.In the present embodiment, the voice data 610 that receives at I2S input unit 112 places is imported into information adder 113, and there, I2S handles required audio sampling frequency and is added to voice data 610 as " HDMI.P.H 611 " of channel header.The voice data 610 that is added with header by this way is called voice data 612 hereinafter.Voice data 612 is transferred to selector 114.I2S handles and is not limited to common I2S processing, and on the contrary, the I2S processing of here carrying out can be the processing with left-justify form or Right Aligns form, utilizes these forms, can export synchronously dateout with the L-R clock.
The above details of having described SPDIF and I2S processing procedure with reference to figure 5 and Fig. 6.Information adder 113 is adjusted the value of the audio sampling frequency Fs in the header packet information in the above described manner based on the EDID information in the judgment means 151 of remaining on.For this processing procedure, can be with reference to the flow process of (1) among the figure 4 → (2) → (3) → (6).It also can be situation about transmitting to information adder 113 from decline sampling controller 116 about the information of audio sampling frequency Fs.For this situation, can be with reference to the flow process of (1) among the figure 4 → (2) → (3) → (6) → (7) → (8 or 9).Even in this case, clock information generator package 117 also produces the audio clock packets of information that comprises frequency division information N and temporal information CTS based on the information of audio sampling frequency Fs.
After finishing above-mentioned processing procedure, selector 114 receives voice data.Selector 114 can switch between the I2S of I2S voice data and SPDIF voice data based on the instruction (referring to the flow process of (1) among Fig. 4 → (2) → (3) → (6)) of judgment means 151, and exports in them any.
Judge when being necessary to change being provided with of audio sampling frequency Fs based on the analysis of EDID information when judgment means 151, the audio data transmission that receives at selector 114 places is to decline sampling controller 116.On the contrary, judge when there is no need to change being provided with of audio sampling frequency Fs when judgment means 151, the audio data transmission that receives at selector 114 places is to clock/voice data/dumb sound controller 118.
In order to set forth the difference with routine techniques, the situation of routine shown in Figure 3.In the structure of this regular situation, do not provide decline sampling controller 116 shown in Figure 2.Selector 114 arrives clock/voice data/dumb sound controller 118 with whole audio data transmission.
Clock information generator package 117 shown in Figure 2 generates the audio clock packets of information that comprises frequency division information N and temporal information CTS.Based on from the information of judgment means 151 ((1) → (2) → (3) → (6) flow process by Fig. 4 produces) or based on the information ((1) → (2) → (3) → (6) → (7) → (the 8 or 9) flow process by Fig. 4 produces) of the audio sampling frequency Fs that is provided with by decline sampling controller 116, utilize computing formula (1) to calculate frequency division information N and temporal information CTS.Clock information generator package 117 generates the audio clock packets of information based on frequency division information N that is calculated and temporal information CTS.
When judging the analysis that is necessary based on EDID information and change being provided with of audio sampling frequency Fs in the audio clock packets of information, selector 114 will be added with the audio data transmission of audio clock packets of information to decline sampling controller 116.On the contrary, when judging when there is no need to change being provided with of audio sampling frequency Fs, selector 114 with audio data transmission to clock/voice data/dumb sound controller 118.
Decline sampling controller 116 will be transferred to information adder 113 and clock information generator package 117 by the voice data (it need change the value of audio sampling frequency Fs) of selector 114 transmission, so that the audio sampling frequency Fs of these processors 113 and 117 replacement voice datas.Fig. 4 illustrates the flow process that the replacement audio sampling frequency Fs that is carried out by decline sampling controller 116 is controlled.Replacement audio sampling frequency Fs carries out by (1) → (2) → (3) → (6) → (7) → (8 or 9) flow process of Fig. 4.Hereinafter will describe the replacement of audio sampling frequency Fs in detail.
At first, judgment means 151 generates the information of (following down-sampled) the audio sampling frequency Fs that indicates whether to reset based on EDID information and the configuration information of employed audio sampling frequency Fs when the replacement.Judgment means 151 is sent to decline sampling controller 116 by block of registers 130 with the information that is produced.Information is transmitted by (1) among Fig. 4 → (2) → (3) → (6) → (7) flow process.Decline sampling controller 116 will be transferred to information adder 113 ((8) Fig. 4) and clock information generator package 117 ((9) among Fig. 4) from judgment means 151 signal transmitted.In the voice data produced for resetting and the audio clock packets of information in the situation of audio sampling frequency Fs, its processing procedure also can be carried out by (8) among Fig. 4 and (9) flow process.
About the replacement audio sampling frequency, value that also can fixed-audio sample frequency Fs or by it being made into half of original value or 1/4th this value being set.When it is set to fixed value, can:
-this value is fixed as minimum audio sampling frequency Fs from the EDID information acquisition; Perhaps
-this value is fixed as the audio sampling frequency Fs that can receive by all devices.When by it being made into half of original value or 1/4th when audio sampling frequency is set, judgment means 151 based on EDID information with original value make into half or 1/4th.
Be described with reference to Figure 4 audio sampling frequency Fs being arranged to any fixed value or by making half of original value or the details that 1/4th fixed values that obtained are controlled into.In description, provide following supposition:
-192kHz is configured to audio sampling frequency; And
-video/audio data receiving system 200 keeps EDID information in EDID ROM202, wherein maximum Fs output is 96kHz.
When video/audio data dispensing device 100 and AV AMP (the linking objective equipment of tone frequency channel wire 153) link to each other by optical cable by tone frequency channel wire 153, be transferred to HDMI LSI 101 and AV AMP by audio data transmission line 152 about the information of audio sampling frequency Fs.
So:
-because B/E LSI 150 has been connected to AV AMP (the linking objective equipment of tone frequency channel wire 153),, video/audio data dispensing device 100 is used for giving the pattern to the output of AV AMP output audio (being used for priority not being given the pattern of HDMI video output) with priority so becoming; And
-when having connected HDMI (video/audio data receiving system 200), the audio sampling frequency Fs (192kHz) that conforms to output to AV AMP is transferred to HDMI LSI 101.On the other hand, when AV AMP (the linking objective equipment of tone frequency channel wire 153) disconnects with tone frequency channel wire 153:
-video/audio data dispensing device 100 becomes and is used for giving pattern to HDMI (video/audio data receiving system 200) output audio output with priority; And
-might change audio sampling frequency Fs by B/E LSI 150.
Further, utilize the fixed value 48kHz of audio sampling frequency Fs to be provided with down under the down-sampled situation under these conditions, when video/audio data receiving system 200 was connected to video/audio data dispensing device 100 by HDMI, judgment means 151 obtained to remain on EDID information among the EDID ROM 202 by above-mentioned EDID information acquisition process process ((1) among Fig. 4 → (2) → (3) → (4) → (5) → (4) → (3) → (2) → (1) flow process).Judgment means 151 judges based on the EDID information that is obtained whether the audio sampling frequency Fs (192kHz) that is provided with is effective to the video/audio data receiving system 200 as the HDMI linking objective when voice data outputs to HDMI LSI 101.In this case, by comparing with set audio sampling frequency Fs (192kHz), can judge audio sampling frequency Fs and need be lowered by and sample fixed value 48kHz based on the maximum Fs output (96kHz) of the video/audio data receiving system 200 of EDID information.In case make such judgement, judgment means 151 is just by down-sampled command information and Fs configuration information 48kHz under block of registers 130 downward down-sampled controller 116 transmission.This transmission of Information is carried out by (1) shown in Figure 4 → (2) → (3) → (6) → (7) flow process.
In case receive down down-sampled with the information that is performed, decline sampling controller 116 just is transferred to the Fs configuration information of being transmitted (48kHz) information adder ((8) among Fig. 4), and further Fs configuration information (48kHz) is transferred to clock information generator package 117 ((9) among Fig. 4).Information adder 113 is by with received Fs configuration information (48kHz) being package informatin head (611 among 512 among Fig. 5 or Fig. 6) generation voice data.Clock information generator package 117 according to frequency division information N and the temporal information CTS in the received Fs configuration information (48kHz), generates the audio clock packets of information by using aforementioned calculation formula (1).
When under the same conditions by audio sampling frequency Fs being made into half of original value or 1/4th being provided with down when down-sampled, judgment means 151 obtains to remain on EDID information among the EDID ROM 202 by above-mentioned EDID information acquisition process process ((1) shown in Figure 4 → (2) → (3) → (4) → (5) → (4) → (3) → (2) → (1) flow process) after video/audio data receiving system 200 is connected to video/audio data dispensing device 100 by HDMI.Judgment means 151 judges based on the EDID information that is obtained whether the audio sampling frequency value (192kHz) to HDMI LSI 101 output audios the time is effective to the video/audio data receiving system 200 as the HDMI linking objective.In the present embodiment, judgment means 151 will be arranged on the maximum Fs output (96kHz) of video/audio data receiving system 200 in the EDID information and compare with audio sampling frequency Fs (192kHz) under the output state.As a result, judgment means 151 is judged to be necessary audio sampling frequency Fs descended and is sampled the value of half, i.e. 96kHz.In case make such judgement, judgment means 151 just will descend down-sampled command information and Fs configuration information (96kHz) to be transferred to decline sampling controller 116 by block of registers 130 by (1) shown in Figure 4 → (2) → (3) → (6) → (7) flow process.In case receive down down-sampled command information and Fs configuration information (96kHz), decline sampling controller 116 just is transferred to information adder 113 ((8) among Fig. 4) with received Fs configuration information (96kHz), and further it is transferred to clock information generator package 117 ((9) among Fig. 4).Information adder 113 is based on package informatin head (512 or Fig. 6 of Fig. 5 611), and is above with reference to figure 5 and the described processing procedure of Fig. 6 by received Fs configuration information (96kHz) is used, and generates voice data.Clock information generator package 117 replaces with the content of the Fs configuration information (96kHz) in the computing formula (1) with audio frequency frequency division information N and temporal information CTS, to produce the audio clock packets of information based on the value that is obtained.Above-described embodiment is used for fixed value that audio sampling frequency Fs is arranged to be scheduled to, or is arranged to by making half or 1/4th fixed values that obtained of original value into.
Clock/voice data/dumb sound controller 118 can be carried out and be used to stop or the control of dumb sound voice data and audio clock packets of information.When stop tone audio data only, clock/voice data/dumb sound controller 11 8 is the stop tone audio data only, but carries out the normal process of clock information bag.When stopping audio frequency clock information bag and voice data, clock/voice data/dumb sound controller 118 stops audio frequency clock information bag and voice data.Further, when carrying out the dumb sound processing procedure, clock/voice data/dumb sound controller 118 outputs are converted into the voice data of " 0 data ", as dumb sound information.
As mentioned above, in digital transmission system and clock-generating device according to present embodiment, based on the EDID information that obtains from block of registers 130, handle video processing block 133 from the video data that B/E LSI 150 transmission come, and voice data is handled in audio block 110.Then, video data and voice data are transferred to video/audio data receiving system 200 by HDMI output device 120.
Fig. 7 is the structured flowchart that comprises according to the receiver side of the HDMI communication system of the digital transmission system of embodiment and clock-generating device.
The HDMI message transmission that receives at HDMI input unit 201 places is to A/V controller 220.A/V controller 220 is arranged on HDMI LSI 210 places, to carry out the control to video data and voice data.A/V controller 220 arrives video I/F211 with the video Data Transmission of received HDMI information, and audio data transmission is arrived audio frequency I/F 213, and clock transfer is arrived audio frequency PLL 212.
B/E LSI 230 comprises the judgment means 231 that is used for whole video/voice data receiving system is carried out control.Judgment means 231 is carried out control based on received HDMI information etc. to each clock.B/E LSI 230 carries out control with configuration register and state controller 214 cooperations.Based on the control content of coming from B/ELSI 230 transmission, configuration register and state controller 214 are carried out the control of A/V controller 220, audio frequency PLL 212 and EDID ROM 202.The control here refers to the control of each processing block, and for example dumb sound is handled and EDID reads.Audio frequency PLL 212 generates the clock that is used in the video/audio data receiving system 200 based on the clock of video/audio data dispensing device side.
Fig. 8 illustrates the structure of the decline sampling controller 211 that is arranged on receiver side.When A/V controller 220 received voice data, decline sampling controller 211 (being arranged in the A/V controller 220) compared the audio sampling frequency Fs of voice data with the maximum output Fs information that is stored in the receiver side among the EDID ROM 202.When received audio sampling frequency Fs surpassed maximum output Fs, decline sampling controller 211 was judged may need to reset frequency division information N and temporal information CTS and make them be suitable for receiver side.Dumb sound controller 215 is carried out dumb sound control based on from configuration register and the next control content of state controller 214 transmission.In this case, the voice data that is lowered by sampling according to frequency division information N and temporal information CTS comes from 220 transmission of A/V controller.But, dumb sound controller 215 can make the voice data dumb sound by making voice data become " 0 data ".
Now, by being described with reference to Figure 13 the processing procedure that is used for following this situation: video/audio data dispensing device 100 will send to video/audio data receiving system 200 (the audio sampling frequency Fs that is suitable for is 48kHz) corresponding to frequency division information N and the temporal information CTS of audio sampling frequency Fs (96kHz).When the frequency division information N of audio sampling frequency Fs (96kHz) and temporal information CTS by mistakenly by HDMI cable 300 when HDMI output device 120 is transferred to HDMI input unit 201, HDMI input unit 201 is transferred to A/V controller 220 ((1) shown in Figure 13 → (2) flow process) with received frequency division information N and temporal information CTS.
B/E LSI (CPU) 230 obtains the receivable maximum Fs information (the expression nearly audio sampling frequency Fs of 48kHz can be received) ((3) among Figure 13 → (4) flow process) that is stored among the EDID ROM 202.Further, judgment means 231 is obtained frequency division information N (96kHz: corresponding to the audio sampling frequency Fs of 96kHz) and temporal information CTS (96kHz: corresponding to the audio sampling frequency Fs of 96kHz) from A/V controller 220, and these information sets and the receivable maximum Fs information (48kHz) that obtains from EDID ROM 220 are compared ((5) Figure 13 → (4) flow process).
In this case, judgment means 231 is judged the audio sampling frequency Fs (48kHz) greater than receivable maximum Fs information (48kHz) by the indicated audio sampling frequency Fs (96kHz) of the frequency division information N (96kHz) that obtains from A/V controller 220 and temporal information CTS (96kHz).In case make such judgement, judgment means 231 just will be used for carrying out down down-sampled control information and be transferred to A/V controller 220 ((4) of Figure 13 → (5) flow process).
When A/V controller 220 received decline controlling of sampling information, the decline sampling controller 221 that is arranged in the A/V controller 220 was just carried out following control ((6) among Figure 13).That is:
Fs value among-replacement frequency division information N and the temporal information CTS so that the Fs value can be handled, arrives audio frequency PLL 212 with clock transfer then, and audio data transmission is arrived dumb sound controller 215; Perhaps
-carry out and handle to stop clock and voice data, so that not strange sound produces when output.
Out-of-date when judging frequency division information N and temporal information CTS by this voice data receiving system processing, judgment means 231 also can be transferred to the dumb sound control information dumb sound controller 215, handle so that dumb sound controller 215 is carried out the dumb sound of voice data, will arrive audio frequency I/F 213 ((4) of Figure 13 → (7) flow process) through the audio data transmission that dumb sound is handled then.Carry out processing by following (1) shown in Figure 13 → (7) flow process in the manner described above,, might handle and carry the frequency division information N that not can be applicable to receiving system 200 and the voice data of temporal information CTS for receiving system 200.
Fig. 9 and Figure 10 illustrate the flow chart of the whole flow process of video/audio data dispensing device 100.As shown in Figure 9, video/audio data dispensing device 100 checks that HDMI connect, and confirms and (S100) till video/audio data receiving system 200 links to each other up to its.When confirming that HDMI connects, video/audio data dispensing device 100 is judged video/audio data receiving system 200 and has been identified.So video/audio data dispensing device 100 starts following connection processing process.Just, begin read (S101) of EDID information by block of registers 130.When finishing the reading of EDID information, analyze EDID information (S102).By analyzing EDID information, can be applicable to the video/audio data receiving system Fs information, the number of channel, be read with the compatibility of SPDIF and I2S etc.When making a decision, uses B/E LSI150 the information that is read.When finishing the analysis of EDID information, program jump is to step 2 (referring to Figure 10).
In step 2, at first, judge whether video/audio data dispensing device 100 is under the preferential state of HDMI audio frequency (S201).Confirming video/audio data dispensing device 100 and video/audio data receiving system 200 when the judgement by S201 links to each other by HDMI, but when not having other audio frequency apparatus to be connected to video/audio data dispensing device 100 except HDMI, the state of judging is a HDMI audio frequency output mode of priority.Utilize this judgement, be necessary to consider to regulate audio sampling frequency Fs, and program jump is to S202 by B/E LSI 150.
Simultaneously, confirming video/audio data dispensing device 100 and video/audio data receiving system 200 when the judgement by S201 links to each other by HDMI, and when also having other audio frequency apparatus also to be connected to video/audio data dispensing device 100 except HDMI, the state of judging is that the HDMI audio frequency is exported non-mode of priority.Utilize this judgement, be necessary to consider to regulate audio sampling frequency Fs, and program jump is to S205 by HDMI LSI 214.
Judge in the treatment S of carrying out when video/audio data dispensing device 100 is in HDMI audio frequency output mode of priority 202 at S201, judge whether to be necessary at first to carry out the processing (S202) of audio sampling frequency Fs by B/E LSI 150.When in S202, judging when being necessary to change audio sampling frequency Fs, calculate the audio sampling frequency Fs of B/E LSI 150.Then, the audio sampling frequency Fs that is calculated is arranged to voice data and audio clock packets of information (S203) applicable to voice data receiving system 200.This set is handled and is carried out based on the EDID information of analyzing in S102.After this, voice data is from B/E LSI 150 outputs (S204).
Simultaneously, when in S202, judging when there is no need to change audio sampling frequency Fs, do not carry out any processing with regard to outputting audio data (S204).Then, program jump is to the judgement (S208) of dumb sound set handling.
Judging video/audio data dispensing device 100 at S201 is in the treatment S of carrying out when the HDMI audio frequency is exported non-mode of priority 205, B/E LSI 150 does not carry out any processing ground outputting audio data (S205), and this is because audio sampling frequency is regulated by HDMI LSI 101.In this case, the preferential voice data of B/E LSI 150 outputs.After B/E LSI 150 outputting audio datas, calculate from the audio sampling frequency Fs of the next voice data of B/E LSI 150 transmission.Then, audio sampling frequency Fs that is calculated and the EDID information of analyzing in S102 are compared, to judge whether to be necessary to change audio sampling frequency Fs (S206).
When judging in S206 when there is no need to change audio sampling frequency Fs, program is not carried out any special processing and is just transferred to judgement (S208) to the dumb sound set handling.On the other hand, when judging when being necessary to change audio sampling frequency Fs, voice data and audio clock packets of information are suitable for the voice data and the audio clock packets of information (S207) of video/audio data receiving system 200 based on the audio sampling frequency Fs through changing instead.Specifically, clock information bag setting device 117 is regulated frequency division information N and temporal information CTS, so that information adder 113 can be based on 151 pairs of judged results that are necessary to change audio sampling frequency Fs of judgment means, with audio sampling frequency Fs be arranged to fixed value, initial value half or 1/4th.When finishing the adjusting of frequency division information N and temporal information CTS, program jump is to the judgement (S208) to the dumb sound set handling.
There is no need to carry out dumb sound when being provided with when judging in S208, program jump is to S210, just transmits HDMI output with what do not carry out any processing.On the other hand, when judging when being necessary, program jump is to S209, any processing procedure below carrying out selectively in this step:
-be used for a processing of the output of stop tone audio data;
-be used to stop audio frequency clock information bag and processing of audio data; Or
-be used for output " 0 data " as processing of audio data.
By changing audio clock packets of information, voice data and dumb sound setting in a different manner, select the processing that in S209, to carry out in can processing from the above description.Control set audio clock packets of information in turn and voice data outputs to video/audio data receiving system 200 (S210) from HDMI output device 120 by above-mentioned.
Figure 11 B-Figure 11 C and Figure 12 A-Figure 12 C are diagrammatic sketch according to an embodiment of the invention.Figure 11 A illustrates adjusting that B/E LSI 150 do not carry out audio sampling frequency Fs and handles (S203) and dumb sound processing (S208) conventional method with regard to outputting audio data (S204 or S205).This is the method that conventionally adopts.
In first embodiment shown in Figure 11 B, carry out the adjusting of audio sampling frequency Fs by B/E LSI 150 and handle (S203), then from B/E LSI 150 outputting audio datas (S204).
In second embodiment shown in Figure 11 C, carry out the adjusting of audio sampling frequency Fs by B/E LSI 150 and handle (S203), then from B/E LSI 150 outputting audio datas (S204).Further, audio clock packets of information/voice data/dumb sound (S209) is set.
In the 3rd embodiment shown in Figure 12 A, from B/E LSI 150 outputting audio datas (S205).Then, carry out the adjusting processing (S207) of audio sampling frequency Fs by HDMI LSI 101.
In the 4th embodiment shown in Figure 12 B,, and handle (S207) by the adjusting that HDMI LSI 101 carries out audio sampling frequency Fs from B/E LSI 150 outputting audio datas (S205).Further, audio clock packets of information/voice data/dumb sound (S209) is set.
In the 5th embodiment shown in Figure 12 C,, and audio clock packets of information/voice data/dumb sound (S209) is set from B/E LSI 150 outputting audio datas (S204 or S205).The 5th embodiment is the processing that does not need the decline controlling of sampling of HDMI LSI 101, and can pass through audio clock packets of information/voice data/dumb sound set handling (S209), the processing procedure that only is used for the stop tone audio data and be used to stop audio frequency clock information bag and the processing of audio data process between switch.
When as the same in the situation of the 4th embodiment and the 5th embodiment, when in S207, carrying out the processing of audio sampling frequency Fs, preferably carry out audio clock packets of information/voice data/dumb sound set handling (S209).
The 5th embodiment is one best among first to the 5th embodiment.Reason is as follows.In the 5th embodiment, the frequency Fs that is suitable for the equipment of opposite side (video/audio data receiving system 200) is arranged to the audio sampling frequency Fs (S207) of audio clock packets of information and voice data by HDMILSI 101.Then, execution is used for " 0 data " are re-writed processing of audio data, handles (S209) as dumb sound.This method is preferably used in video/audio data dispensing device 100 sides.It is as follows that the dumb sound that is used for voice data is made into " 0 data " is handled best reason.
As mentioned above, there is three types dumb sound to handle.These three types are:
-be used for a processing of the output of stop tone audio data;
-be used to stop audio frequency clock information bag and processing of audio data; With
-be used for output " 0 data " as processing of audio data.
Exist audio clock information and voice data to hinder the possibility of the show state of video/audio data receiving system 200.But, in " 0 data " processing, there is not this influence to video/audio data receiving system 200 as voice data output.Therefore, " 0 data " are best during these kinds dumb sound is handled as the processing of voice data output.
Figure 14 is the processing that is used for illustrating digital transmission system and clock-generating device, the flow chart of the whole flow process of the decline sampling processing of carrying out in video/audio data receiving system 200 sides.At first, judge whether the frequency division information N and the temporal information CTS that receive at video/audio data receiving system 200 places can handle (S301) by the audio sampling frequency Fs that is provided with in video/audio data receiving system 200.When judging frequency division information N and temporal information CTS when applicable in S301, program is not carried out the decline sampling processing and is just transferred to audio frequency output processing procedure (S308).On the other hand, when in S301, judging frequency division information N and temporal information CTS when unavailable, then judge whether to carry out decline sampling processing control (S302).When judging execution decline controlling of sampling in S302, frequency division information N that receives at video/audio data receiving system 200 places and temporal information CTS are made into can be by the value (S303) of the audio sampling frequency Fs processing that is provided with in video/audio data receiving system 200.
After the processing of having carried out S303, judge whether stop tone audio data and clock (S304).When in S304, judging stop tone audio data and clock, the output of stop tone audio data and the output of clock (S305).When in S304, judging not stop tone audio data and clock, then judge whether to carry out dumb sound and handle (S306).When in S306, judging the processing of execution dumb sound, just carry out dumb sound set handling (S307).Then, program jump is to audio frequency output treatment S 308.On the other hand, when judging in S306 when not carrying out dumb sound and handling, program is not just transferred to dumb sound set handling (S307) and is not just transferred to audio frequency output and handle (S308).
For video/audio data receiving system 200, the best way is to carry out dumb sound to handle after carrying out the decline sampling processing.Reason is as follows.That is, when stop tone audio data and clock, have the possibility that clock can not arrive audio frequency I/F 213 takes place, so video/audio data receiving system 200 can not correctly be discerned voice data.Further, do not handle, the possibility of the strange sound of generation is just arranged if under carrying out, do not carry out dumb sound after down-sampled.Owing to these reasons, can think that for video/audio data receiving system 200 method that down-sampled back execution dumb sound is handled under carrying out is best mode.
By as can be known above, might utilize the present invention, by the value that the frequency division information N on the video/audio data dispensing device 100 and temporal information CTS is made into can receive, transmission frequency division information N and temporal information CTS at video/audio data receiving system 200 places.Further, also might make voice data into receivable data at the video/audio data receiver side.Therefore, the present invention can provide and can transmit the digital transmission system of data and the processing method of clock-generating device to various video/audio data receiving systems 200.
By with reference to most preferred embodiment, described the present invention in detail.But, might not depart from the spirit of claims and broad scope and part is made up and revises.
Claims (12)
1. voice data dispensing device comprises:
Input unit, voice data are transfused to wherein;
Information acquisition device, it is used for obtaining the information relevant with its voice data disposal ability from the voice data receiving system, and wherein said voice data receiving system is the transmission sources that is transfused to the described voice data of described input unit;
Analyzer, it is used to analyze the described information of being obtained by described information acquisition device;
The information adder, it is based on the result of the analysis of being carried out by described analyzer, generation is suitable for the header of the described voice data of described voice data receiving system, then consequent described header is added in the described voice data that is transfused to described input unit;
The packets of information generator, it is used to generate and be input to the described voice data corresponding audio clock information bag of described input unit; With
Output device, it is used for to described voice data receiving system output superposition of data, and wherein said superposition of data is by obtaining in the described voice data that is added with described header that described audio clock packets of information is added to.
2. voice data dispensing device according to claim 1 further comprises modifier, and it will be arranged on the sample frequency that sample frequency in the described voice data that is imported into described input unit is suitable for described data sink instead.
3. voice data dispensing device according to claim 2, wherein, described output device can limit the signal level of voice data to be exported.
4. voice data dispensing device according to claim 2, wherein, described input unit can be imported audio compressed data and audio compressed data not, as described voice data.
5. voice data dispensing device according to claim 4, wherein:
Described audio compressed data is the voice data that meets the IEC50958/61937 standard; And
Described not audio compressed data is the voice data that meets IEC60958 standard, I2S and left-justify form or Right Aligns form.
6. voice data dispensing device according to claim 1, wherein, described output device can stop the output of described audio clock packets of information and described voice data.
7. voice data dispensing device according to claim 1, wherein, described output device can stop the output of described voice data.
8. voice data dispensing device according to claim 6, wherein, described output device can stop the output of described audio clock packets of information and described voice data simultaneously.
9. video/audio output unit that is arranged in the described voice data dispensing device of claim 1, it can a stop tone audio data.
10. voice data receiving system comprises:
Input unit, the superposition of data that is made of voice data and audio clock packets of information is transfused to wherein;
Analyzer, it extracts described voice data from the described superposition of data that is transfused to described input unit, and analyzes the header of this voice data;
Reproduce clock generator, it extracts described audio clock packets of information from the described superposition of data that is imported into described input unit, and produces the reproduction clock based on described audio clock packets of information; With
Output device, it is used to export described reproduction clock, described voice data and video data.
11. voice data receiving system according to claim 10 further comprises modifier, it will be arranged on the sample frequency that sample frequency in the described voice data that is imported into described input unit is suitable for described data sink instead.
12. voice data receiving system according to claim 10, wherein, described output device can limit the output level of voice data to be exported.
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| WO2017076246A1 (en) * | 2015-11-04 | 2017-05-11 | 深圳市中兴微电子技术有限公司 | Display parameter acquisition method, display device, terminal and storage medium |
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| CN104254007A (en) * | 2014-09-03 | 2014-12-31 | 海信集团有限公司 | Method and device for processing audio |
| WO2017076246A1 (en) * | 2015-11-04 | 2017-05-11 | 深圳市中兴微电子技术有限公司 | Display parameter acquisition method, display device, terminal and storage medium |
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Application publication date: 20080618 |