CN101399975A - Video/audio output apparatus - Google Patents
Video/audio output apparatus Download PDFInfo
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- CN101399975A CN101399975A CNA2008101669188A CN200810166918A CN101399975A CN 101399975 A CN101399975 A CN 101399975A CN A2008101669188 A CNA2008101669188 A CN A2008101669188A CN 200810166918 A CN200810166918 A CN 200810166918A CN 101399975 A CN101399975 A CN 101399975A
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Abstract
A format converter resolution converts first video data input to a video input device, thereby generating second video data. An HDMI converter converts the second video data into an HDMI signal. A first clock generator generates a second clock signal having a frequency corresponding to a resolution of the second video data based on a first clock signal input to the video input device and supplies the second clock signal to the format converter and the HDMI converter. A second clock generator generates a third clock signal having a frequency corresponding to a resolution of the HDMI signal and supplies the third clock signal to the HDMI converter. The format converter converts the first video data into the second video data based on the first clock signal and the second clock signal. The HDMI converter converts the second video data into the HDMI signal based on the second clock signal and the third clock signal.
Description
Technical field
The video/audio output apparatus, video/audio output apparatus control that can export digital signal between with receiving equipments such as DVD player, DVD recorder, BD (Blue-ray Disc) video tape recorder etc. and Digital Television when the present invention relates to be connected is with program and resolution conversion method.
Background technology
Fig. 6 shows the system's schematic configuration of video/audio output apparatus B and the receiving equipment 30 that is connected by HDMI (HighDefinition Multimedia Interface) in the prior art.Video/audio output apparatus B is connected by HDMI cable 40 with receiving equipment 30.HDMI dispensing device 10 in the video/audio output apparatus B sends to receiving equipment 30 with the video data and the voice data of input via HDMI cable 40.
Video/audio output apparatus B comprises: tuner 1, DVD driver 2, built-in CPU3 and the HDMI dispensing device 10 of B/E LSI.HDMI dispensing device 10 comprises: video input unit 11 is imported into video input unit 11 from tuner 1 or DVD driver 2 by the video data that CPU3 imports; Color space (CS) transducer 22 carries out the CS conversion of video data; Audio frequency loader 12, the voice data that provides by CPU3 from tuner 1 or DVD driver 2 is imported into audio frequency loader 12; Video/audio synthesizer 14 will be also synthetic synchronously with the voice data from 12 inputs of audio frequency loader from the video data of video input unit 11 inputs; Encryption equipment 15, encrypted video/audio frequency generated data; HDMI follower 16 is converted to the HDMI signal with the video/audio generated data and exports to the outside; Clock generator 17 generates output clock signal CK1 according to the clock signal C K0 that imports synchronously with video data in the video input unit 11; With register 18, receive the request that is provided with from CPU3, switch the operator scheme of each several part.
In HDMI dispensing device 10, generate output clock signal CK1 according to the clock signal C K0 that is input to video input unit 11, so when the change resolution of video data, export and also can change with clock signal CK1.Particularly in this HDMI dispensing device that digital signal is encrypted and exported such as HDMI equipment, when the clock of output video data (HDMI signal) was disorderly, output image can be significantly disorderly.Therefore,, in existing HDMI dispensing device, temporarily stop earlier the output of HDMI signal for fear of such problem, after beginning output once more, carry out and connection device between re-authentication.
Below, the sequential operation during input such as the switching between DVD driver 2 and tuner 1, the replacing of variety classes DVD hand-off process is described in existing HDMI dispensing device 10 with reference to figure 7.In the following description, supposed before being about to carry out above-mentioned input hand-off process, after the video data of DVD driver 2 output is input to video input unit 11 with the resolution (clock signal is 148.352MHz) of 1080P, from 16 outputs of HDMI follower.
In this state, what video data took place provides the source when DVD driver 2 switches to the processing of tuner 1, and the register 18 of CPU3 to HDMI dispensing device 10 in asks to import hand-off process.So register 18 notifies HDMI follower 16 to stop output (N1) in view of the above.After output stopped, the encryption that relates to the HDCP (High-bandwidth Digital Content ProtectionSystem) of copyright protection was closed (OFF), and encryption equipment 15 is changed to initial condition (N2).Then, CPU3 imports hand-off process (DVD driver → tuner) (N3).Then, the resolution (N4) of the video data of CPU3 after register 18 is provided with the input hand-off process.The resolution (clock signal is about 74.176MHz) of 1080i is set here.Then, the output via register 18 notice HDMI followers 16 video datas begins (N5).Afterwards, between as the receiving equipment 30 of connection device and video/audio output apparatus B, carry out authentication processing, and by the encryption (N6) of encryption equipment 15 beginning video/audio generated datas.Then, the output via register 18 notice HDMI follower 16HDMI signals shields (ミ ユ-ト) releasing (N7).Time interval (Tb+Tc) till finishing to the image switching of receiving equipment 30 sides is according to system and difference is generally the several seconds.
In addition, about aforesaid problem (the clock disorder in the HDMI signal causes the remarkable disorder of output image), in Japanese publication document (spy opens 2007-89013 number), put down in writing the method summary that output resolution ratio is fixed as highest resolution, but do not disclose specific embodiment in the document.
Below, the sequential operation when the input color space switches is described in existing HDMI dispensing device with reference to figure 9.In the following description, supposed before being about to import the color space hand-off process, after the video data of DVD driver 2 output is input to video input unit 11 as rgb signal, carry out color space conversion (RGB → YCbCr), and from 16 outputs of HDMI follower by CS transducer 22.
In this state, when along with change such as the broadcast medium displacement in the DVD driver 2 switching of color space taking place in video data, the register 18 of CPU3 to HDMI dispensing device 10 in asks to import hand-off process.In view of the above, register 18 notice HDMI followers 16 stop output (Q1).After output stopped, the encryption of HDCP was closed (OFF), and encryption equipment 15 is changed to initial condition (Q2).Then, the CPU3 side is imported hand-off process (RGB → YCbCr) (Q3).Then, the color space (being YCbCr here) after the input hand-off process is set to register 18 (Q4).Then, the output via register 18 notice HDMI follower 16HDMI signals recovers (Q5).Afterwards, and after carrying out authentication processing between the receiving equipment 30 as connection device, the encryption (Q6) of encryption equipment 15 beginning video/audio generated datas.Then, remove (Q7) via the output shielding of register 18 notice HDMI follower 16HDMI signals.In receiving equipment 30 sides, to switching time interval (Tg+Th) till the image switching cause is finished by color space according to system and difference is generally the several seconds.
In existing HDMI dispensing device 10, generate video output clock signal CK1 according to the clock signal C K0 of input, so when the change resolution of the video data of importing, export and to change thereupon with clock signal CK1.Therefore, in receiving equipment 30 sides that are connected with HDMI dispensing device 10, image gets muddled.For fear of this problem, must temporarily stop output to HDMI cable 40 in the past.Particularly in this HDMI dispensing device 10 that digital signal is encrypted and exported such as HDMI equipment, when output is disorderly with clock signal CK1, the authentication of implementing in order to encrypt by each pixel clock can produce deviation, and the disorder of the output image of receiving equipment 30 sides is more remarkable.Therefore, must temporarily stop earlier output, after the input video change resolution, begin output once more and also and between the connection device carry out re-authentication, need time several seconds before the output image once more.
Summary of the invention
In view of this, when main purpose of the present invention is input such as the switching between media drive and tuner, the replacing of variety classes medium hand-off process, produces image rapidly and not and realize importing hand-off process mussily.
In order to solve above-mentioned problem, the present invention includes following formation.
(1) video/audio output apparatus of the present invention comprises:
Video input unit is imported first video data and first clock signal synchronous with described first video data;
Format converter carries out conversion of resolution to described first video data that is input to described video input unit, generates second video data;
The HDMI transducer is converted to the HDMI signal with described second video data;
First clock generator according to described first clock signal that is input to described video input unit, generates the second clock signal have with the resolution respective frequencies of described second video data, and offers described format converter and described HDMI transducer; With
The second clock maker generates the 3rd clock signal have with the resolution respective frequencies of described HDMI signal, and offers described HDMI transducer,
Described format converter is converted to described second video data according to described first clock signal and described second clock signal with described first video data,
Described HDMI transducer is converted to described HDMI signal according to described second clock signal and described the 3rd clock signal with described second vision signal.
The second clock signal that first clock generator generates, be according to the synchronous state of first video data under be input to video input unit first clock signal generate, so when the resolution of first video data changed because of the input hand-off process such as replacing of the switching between media drive and the tuner, variety classes medium, the result caused the frequency of second clock signal also to change.The HDMI transducer uses when the second clock signal of frequency change is exported second video data (HDMI signal) as mentioned above, and then and produce inconsistently between the output resolution ratio of the receiving equipment side of input before the hand-off process, image gets muddled.
To this, be provided with two in the present invention and constitute the unit as its countermeasure.One is the second clock maker, and another is a format converter.The second clock maker is distinguished mutually with first clock generator, generates the second clock signal corresponding with the resolution of HDMI signal alone and offers the HDMI follower.In view of the above, unlike the prior art, the clock signal of HDMI follower and frequency change is separated.The HDMI follower is provided according to the 3rd clock signal that is provided by the second clock maker by the output function of HDMI signal.The HDMI signal is constant before conversion of resolution and after the conversion of resolution.In other words, output resolution ratio is immobilized.
Output resolution ratio is immobilized, and the input change resolution, so the input conversion of resolution that changes need be fixing output resolution ratio.In order to carry out this conversion, be provided with format converter.Format converter carries out conversion of resolution according to the output resolution ratio of the HDMI follower that is immobilized to the input resolution that changes.
The result, during input such as the replacing of the switching between media drive and tuner, variety classes medium hand-off process, even input resolution changes because of this input hand-off process, output resolution ratio can not change yet, and annexation between HDMI dispensing device and the receiving equipment and authentication relationship can not produce and not match.Therefore, needn't carry out from of the output of HDMI dispensing device and stop, no longer needing output to recover and re-authentication to the HDMI of receiving equipment signal.So, when the input hand-off process, can produce image rapidly and not and realize importing hand-off process mussily.
(2) video/audio output apparatus of the present invention is preferably,
Described HDMI transducer comprises:
Color space converter is converted to desirable color space with the color space of described second video data; With
The HDMI follower is converted to described HDMI signal with described second video data after the color space conversion,
Described second clock signal is provided for described format converter and described color space converter,
Described the 3rd clock signal is provided for described HDMI follower.
(3) in addition, the present invention has following form, promptly further comprises:
Receiving ability information obtains device, obtains its receiving ability information from the receiving equipment as the transmission purpose side of described HDMI signal;
The receiving ability resolver is resolved described receiving ability information and is obtained the described receiving ability information that device is obtained, and calculates the receivable ultimate resolution of described receiving equipment; With
Resolution is provided with device, and the described ultimate resolution that described receiving ability resolver is calculated is set in described format converter and the described HDMI follower.
In above-mentioned form, after receiving ability information obtained device and obtains its receiving ability information from receiving equipment, the receiving ability information that the receiving ability resolver resolves obtains was calculated receivable ultimate resolution.And then resolution is provided with device receivable ultimate resolution is set in format converter and the HDMI follower.In view of the above, can in format converter and HDMI follower, ultimate resolution be set automatically.In addition, for receiving ability information, can enumerate EDID (Extended Display Identification Data) as an example.
(4) video/audio output apparatus of the present invention has following form:
This video/audio output apparatus further comprises the audio frequency loader of input audio data;
Described HDMI transducer further comprises and synchronously described second video data and described voice data is synthesized with described the 3rd clock signal and generate the video/audio synthesizer of video/audio generated data;
Described HDMI follower is converted to described HDMI signal with described video/audio generated data.
According to above-mentioned form, in the specification of not only processing video data but also processing audio data, receiving equipment also can produce image rapidly and not and sound is exported the HDMI signal mussily.
(5) the present invention has following form:
Described HDMI transducer further comprises the encryption equipment of described second video data being encrypted with described second clock signal Synchronization;
Described HDMI follower will be converted to described HDMI signal through described second video data of encrypting.
According to above-mentioned form, after second video data was encrypted through encryption equipment, after second video data that process is encrypted was converted to the HDMI signal by the HDMI follower, the HDMI signal that is generated by conversion was output to receiving equipment.In receiving equipment, the decrypted and demonstration of HDMI signal (through second video data of encrypting).Here, encryption and second clock signal Synchronization, and output resolution ratio is constant, and the second clock signal is fixed.Therefore, although be to handling through second video data of encrypting, when the input hand-off process, output image being produced and export the HDMI signal mussily.
(6) the present invention has following form:
Further comprise the encryption equipment of synchronously described video/audio generated data being encrypted with described the 3rd clock signal;
Described HDMI follower will be converted to described HDMI signal through the described video/audio generated data of encrypting.
According to above-mentioned form, the video/audio generated data outputs to receiving equipment as the HDMI signal from the HDMI follower after encrypting through encryption equipment.In receiving equipment, the HDMI signal that the video/audio generated data of being encrypted by process by deciphering and separation constitutes, generate video data and voice data, the encryption of video/audio generated data and the 3rd clock signal are synchronous, and output resolution ratio is constant, and the 3rd clock signal is fixed, although so be to handling through the video/audio generated data of encrypting, when the input hand-off process, output image being produced and export the HDMI signal mussily.
(7) control method of video/audio output apparatus of the present invention may further comprise the steps:
With the input hand-off process of change resolution the time, indicate the shielding of described HDMI follower;
In described video input unit, carry out input hand-off process with change resolution;
By described format converter, to video data, keep the initial value of output resolution ratio from described video input unit, carry out conversion of resolution from the new input resolution after the input hand-off process to the output resolution ratio identical with described initial value;
After conversion of resolution is finished, remove the shielding of described HDMI follower, recover output.
In the control method of above-mentioned video/audio output apparatus, even the change resolution of first video data, the resolution of second video data (HDMI signal) can not change yet.Therefore, can carry out to bring into play the control of the action effect of video/audio output apparatus of the present invention.
(8) control method of video/audio output apparatus of the present invention may further comprise the steps:
When described video input unit generation is switched with the input of described first video data of change resolution, before described first video data after the switching is exported from described video input unit, described HDMI follower is carried out the output shielding indication of described HDMI signal;
Described first video data after switching from the output of described video input unit;
According to described first video data after the switching of described video input unit output, by described format converter generate have with the switching that generates according to described first video data before switching before the switching of the described second video data equal resolution after described second video data;
By described video/audio synthesizer, synchronously described second video data and described voice data after switching are synthesized with described the 3rd clock signal, generate the described video/audio generated data after switching;
By the described video/audio generated data after the described encryption equipment encryption switching; With
After the output of removing described HDMI follower shields,, also export by the described HDMI signal that described HDMI follower generates after switching according to the described video/audio generated data after the switching of process encryption.
In the control method of above-mentioned video/audio output apparatus, even be input to the change resolution of first video data of video input unit, the resolution of second video data (HDMI signal) can not change yet.And, although be the HDMI signal that sends through encrypting, and do not need to implement re-authentication between the receiving equipment yet.Therefore, can carry out to bring into play the control of the action effect of video/audio output apparatus of the present invention.
(9) control method of video/audio output apparatus of the present invention may further comprise the steps:
When described video input unit generation is switched with the input of described first video data of color space variation, before described first video data after the switching is exported from described video input unit, described HDMI follower is carried out the output shielding indication of described HDMI signal;
Described first video data after switching from the output of described video input unit;
According to described first video data after the switching of described video input unit output, by described color space converter generate have with the switching that generates according to described first video data before switching before the switching in the described second video data same hue space after described second video data; With
After the output shielding of removing described HDMI follower, according to described second video data after switching, by described HDMI signal and the output after the described HDMI follower generation switching.
In the control method of above-mentioned video/audio output apparatus, even the color space of first video data changes, the color space of second video data (HDMI signal) can not change yet.Therefore, can carry out to bring into play the control of the action effect of video/audio output apparatus of the present invention.
(10) control method of video/audio output apparatus of the present invention may further comprise the steps:
When described video input unit generation is switched with the input of described first video data of color space variation, before described first video data after the switching is exported from described video input unit, described HDMI follower is carried out the output shielding indication of described HDMI signal;
Described first video data after switching from the output of described video input unit;
According to described first video data after the switching of described video input unit output, by described color space converter generate have with the switching that generates according to described first video data before switching before the switching in the described second video data same hue space after described second video data;
By described second video data after the described encryption equipment encryption switching; With
After the output of removing described HDMI follower shields,, also export by the described HDMI signal that described HDMI follower generates after switching according to described second video data after the switching of process encryption.
In the control method of above-mentioned video/audio output apparatus, even being input to the input color space of the video data of video input unit changes, output color space can not change yet, and, send with the HDMI signal of encrypting although be, also do not carry out and receiving equipment between re-authentication, can bring into play the control of the action effect of corresponding above-mentioned HDMI dispensing device.
According to the present invention, during input such as the replacing of the switching between media drive and tuner, variety classes medium hand-off process, even the resolution of first video data changes because of this input hand-off process, the resolution of second video data (HDMI signal) can not change yet.Therefore, annexation between HDMI dispensing device and the receiving equipment and authentication relationship can not produce again and not match.In view of the above, eliminated, also eliminated the necessity of when output recovers, carrying out re-authentication in the necessity that to the operation of receiving equipment output HDMI signal, stops this operation from the HDMI dispensing device.Consequently, can produce image rapidly and not and realize importing hand-off process mussily.Particularly can omit re-authentication when handling enciphered video data, this is extremely beneficial to finishing the input hand-off process rapidly.
Video/audio output apparatus of the present invention, though the switching that input takes place also can moment output image sound, have the outstanding effect that concerning the user, reduces the stand-by period when switching, useful to AV equipment with HDMI syndeton.
Description of drawings
Other purposes of the present invention will be understood by understanding execution mode described below, and will express in appending claims.And numerous benefits of not mentioning in this specification should be that those skilled in the art can expect after implementing the present invention.
Fig. 1 shows the system construction drawing of the schematic configuration of the system that forms by the video/audio output apparatus that comprises the HDMI dispensing device in the first embodiment of the invention with by the connected receiving equipment of HDMI;
Fig. 2 is the time sequential routine figure of the video/audio output apparatus in the second embodiment of the invention;
Fig. 3 shows the system construction drawing of the schematic configuration of the system that forms by the video/audio output apparatus that comprises the HDMI dispensing device in second embodiment of the invention and the 3rd execution mode with by the connected receiving equipment of HDMI;
Fig. 4 is the exemplary plot that the resolution menu in the second embodiment of the invention is selected;
Fig. 5 shows the flow chart of the operation of the video/audio output apparatus in the second embodiment of the invention;
Fig. 6 is the system construction drawing of video/audio output apparatus of the prior art and receiving equipment;
Fig. 7 is the time sequential routine figure of video/audio output apparatus of the prior art when the input hand-off process;
Fig. 8 is the time sequential routine figure of video/audio output apparatus when the input color space switches in the technology of the present invention;
Fig. 9 is the time sequential routine figure of video/audio output apparatus of the prior art when the input color space switches.
Embodiment
Below, embodiments of the present invention are described with reference to the accompanying drawings.
(first execution mode)
Below, describe first execution mode of the video/audio output apparatus that the present invention relates to reference to the accompanying drawings in detail.Even first execution mode relates to the change resolution of first video data of input, also do not carry out and receiving equipment between the HDMI dispensing device of this form of re-authentication.The video/audio output apparatus here has the video transmission concurrently and audio frequency sends.
Fig. 1 shows the system construction drawing of the schematic configuration of the system that forms by the video/audio output apparatus A that comprises the HDMI dispensing device in the first embodiment of the invention with by the connected receiving equipment 30 of HDMI.Video/audio output apparatus A is connected by HDMI cable 40 with receiving equipment 30.HDMI dispensing device 10 in the video/audio output apparatus A sends to receiving equipment 30 with the video data and the voice data of input via HDMI cable 40.
The video/audio output apparatus A of present embodiment comprises: tuner 1, DVD driver 2, built-in CPU3 and the HDMI dispensing device 10 of B/E LSI.HDMI dispensing device 10 comprises: video input unit 11, audio frequency loader 12, format converter 13, HDMI transducer 23, first clock generator 17, register 18, internal oscillator (OSC) 19 and second clock maker 20.HDMI transducer 23 comprises: CS transducer 22, video/audio synthesizer 14, encryption equipment 15, HDMI follower 16.
Be imported into video input unit 11 from tuner 1 or DVD driver 2 by first video data that CPU3 sends.The voice data of sending by CPU3 from tuner 1 or DVD driver 2 is imported into audio frequency loader 12.Format converter 13 by being converted to desirable output resolution ratio from first video data of video input unit 11 outputs, generates second video data.CS transducer 22 will be exported after its color space of conversion is desirable output color space by second video data that format converter 13 provides.Video/audio synthesizer 14, second video data after will being changed by the color space that CS transducer 22 provides is also synthetic synchronously with the voice data that is provided by audio frequency loader 12.Encryption equipment 15 adds the video/audio generated data that crammed video/audio synthesizer 14 synthesizes.HDMI follower 16 is converted to the HDMI signal with the video/audio generated data through encrypting of encryption equipment 15 output and exports to the outside.First clock generator 17, according to the first clock signal C K0 that imports synchronously with first video data in the video input unit 11, behind generation and the second clock signal CK1, the second clock signal CK1 that generates is offered format converter 13, CS transducer 22 and video/audio synthesizer 14 by the resolution respective frequencies after format converter 13 conversions.Register 18 receives the request that is provided with from CPU3, switches the operator scheme of each several part.Second clock maker 20, oscillator signal Sf according to oscillator 19 outputs, generation have with HDMI follower 16 in the 3rd clock signal C K2 of output resolution ratio respective frequencies after, the 3rd clock signal C K2 that generates is offered CS transducer 22, video/audio synthesizer 14, encryption equipment 15 and HDMI follower 16.The 31st, be built in the HDMI receiving system of receiving equipment 30.
In being input to first video data of video input unit 11, during input such as the switching between DVD driver 2 and tuner 1, the replacing of variety classes DVD hand-off process, its input resolution changes sometimes, but format converter 13 is constituted as: no matter how its input resolution changes, by first video data always is converted to fixing output resolution ratio, generate second video data.For example, when the output resolution ratio of second video data sets in advance to 1080P, no matter how import hand-off process, always the output resolution ratio 1080P of second video data.When the input resolution of first video data with the input hand-off process when 1080P is changed to 1080i, in the processing of format converter 13, change to the conversion of resolution of 1080i → 1080P from the conversion of resolution of 1080P → 1080P.In view of the above, the output resolution ratio of second video data is kept and is immobilized.In addition, the P among the 1080P represents row-by-row system, and the i among the 1080i represents interlace mode.
Can change relative with the input resolution of first video data, the output resolution ratio of second video data, HDMI signal is fixed, so need be the fixing output resolution ratio of second video data, HDMI signal with the input conversion of resolution of the variation of first video data.In order to carry out this conversion, format converter 13 is set.Format converter 13 is consistent with the fixing output resolution ratio (resolution of second video data, HDMI signal) of HDMI follower 16 with the input conversion of resolution of the variation of first video data.
Because have above structure, so during input such as the switching between DVD driver 2 and tuner 1, the replacing of variety classes DVD hand-off process, even input resolution (resolution of first video data) changes because of the input hand-off process, output resolution ratio (resolution of HDMI signal) does not change yet.Therefore, annexation between HDMI dispensing device 10 and the receiving equipment 30 and authentication relationship can not produce and not match.So, not only no longer need temporarily to stop from the HDMI signal of HDMI dispensing device 10, nor need output to recover and re-authentication again to receiving equipment 30 outputs.Therefore, can produce image rapidly and not and realize importing hand-off process mussily.That is, eliminate in the past stand-by period several seconds that is spent till image after switch is exported once more, can export the image after the switching moment.
Below, the video/audio output apparatus A of the present embodiment that as above constitutes with reference to figure 2 explanation time sequential routine of (DVD driver 2 → tuner 1) when the input hand-off process.In the following description, suppose that first video data that is provided by DVD driver 2 is imported into video input unit 11 under the state of the resolution character with 1080P before the input hand-off process, through exporting from HDMI follower 16 after the predetermined process.
When the processing that is switched to tuner 1 from DVD driver 2 when input took place, CPU3 indicator register 18 was imported hand-off process, the 16 output shieldings (S1) of notice HDMI follower.Then, CPU3 imports hand-off process (DVD driver 2 → tuner 1) (S2).Then, CPU3 notice register 18 input and output resolution change to 1080i → 1080P from 1080P → 1080P.After format converter 13 is read the input and output resolution of notifying format converter 13 from register 18, carry out format conversion according to the input and output resolution of reading and (be 1080i → 1080P) (S3) this moment.Here, the resolution of output (resolution of HDMI signal) is fixed, but input resolution (resolution of first video data) changes, so format converter 13 carries out the input conversion of resolution that will the change processing for fixing output resolution ratio.Then, CPU3 removes (S4) via the output shielding of register 18 notice HDMI follower 16HDMI signals.
In the present embodiment, the interval Tf till finishing dealing with to image switching is according to system and difference can shorten to hundreds of ms (subsidiary mentioning is the several seconds) under the prior art situation of Fig. 7.For from the switching of tuner 1 to DVD driver 2 also with above-mentioned effectively same.In addition, indicate the resolution (1080P) of second video data of format converter 13 to be fixed by CPU3, so when first video data with the resolution beyond the 1080P when DVD driver 2 is input to HDMI dispensing device 10, also with above-mentioned effectively same.In addition, even in the result of the medium of changing DVD driver 2 is being provided with when changing of resolution that is input to first video data of HDMI dispensing device 10, because the setting of the output resolution ratio of second video data in the format converter 13 is fixed, so also with above-mentioned effectively same.And, even when encryption equipment 15 always is in the OFF state, also with above-mentioned effectively same.
In addition, Fig. 1 is the structure with DVD driver 2 and tuner 1, even but the structure that DVD driver 2 is only arranged or tuner 1 only arranged also with above-mentioned effectively same.In addition, because the output resolution ratio of second video data is fixed in format converter 13, so be provided with a plurality of B/E LSI such can output video the structure of LSI in, even first video data is switched and is input to the structure of video input unit 11, also with above-mentioned effectively same.In addition, oscillator 19 also can be positioned at the inside of HDMI dispensing device 10.And preferably, oscillator 19 has the clock identical with the clock that is input to CPU3.Having, also can be not have audio frequency loader 12 and structure that video output is only arranged in HDMI dispensing device 10 again.In addition, also can be the not structure in HDMI dispensing device 10 of encryption equipment 15.And CPU3 also can be positioned at HDMI dispensing device 10, and HDMI dispensing device 10 also can be realized by hardware such as LSI.Therefore, CPU3 and HDMI dispensing device 10 can be realized by a chip.
(second execution mode)
HDMI dispensing device when second execution mode of the present invention relates to the receivable highest resolution of output receiver side.Fig. 3 shows the system construction drawing of the schematic configuration of the system that forms by the video/audio output apparatus A that comprises the HDMI dispensing device in the second embodiment of the invention with by the connected receiving equipment 30 of HDMI.In Fig. 3, refer to same formation unit with symbol identical in first execution mode (Fig. 1).The present embodiment its specific structure is as follows.
The 32nd, be arranged at the inside of receiving equipment 30, the EDID (Extended Display Identification Data) of the receiving abilities such as resolution of receiving equipment 30 is described.Specifically, EDID 32 comprises picture format, resolution, aspect ratio, frame frequency, color space, sound type, sampled voice frequency, sound quantizing bit number etc.The 21st, be used for DDC (Display DataChannel) piece of low-speed bidirectional bus that the employed information of authentication operation of the HDCP of plug-and-play operation, copyright protection is received and dispatched.EDID 32 is sent to DDC piece 21 from HDMI receiving system 31 by HDMI cable 40.And then EDID 32 is sent to CPU3 from DDC piece 21 via register 18.CPU3 uses built-in program 24 to resolve the content of obtained EDID32, thereby grasps receiving equipment 30 receivable resolution.Suppose that analysis result as EDID 32 is receiving equipment 30 receivable resolution when for example being four kinds of 480P, 720P, 1080i, 1080P, CPU3 always selects 1080P as highest resolution.In the present embodiment, DDC piece 21 is equivalent to receiving ability information and obtains device, and CPU3 is equivalent to the receiving ability resolver, and register 18 is equivalent to resolution device is set.About other structures, because of identical, so omit explanation with first execution mode.
Fig. 4 is an example of the resolution choice menus of the video/audio output apparatus A output in the present embodiment.The EDID 32 that obtains is resolved, and receiving ability is shown to the user as shown in Figure 4.When selecting AUTO, then always select highest resolution.In addition, also can fix desirable resolution by the user.For example, when selecting 1080i, even the resolution of first video data is owing to the input hand-off process changes, the resolution (output resolution ratio) of second video data, HDMI signal also always is fixed to the resolution 1080i that last time was provided with by the user.
Below, with reference to the operation of the built-in program 24 of the flowchart text CPU3 of figure 5.Program 24 is stored in recording medium and is installed on CPU3.At first, in step n1, confirm that the HDMI dispensing device 10 of video/audio output apparatus A is in connection status with receiving equipment 30 by HDMI cable 40.Then, in step n2, obtain the EDID 32 in the receiving equipment 30 and it is resolved.Then, in step n3, whether confirm that this input picture has been imported into HDMI dispensing device 10 after being ready to complete of input picture (first video data).Then, in step n4, after the highest resolution that the result who selects the EDID by step n2 to resolve obtains carried out format conversion, the HDMI signal that is in masked state began output.In addition, the processing here also can select beyond the highest resolution, last time exported the resolution of selection by the user.Then, in step n5, differentiate the HDCP corresponding device whether receiving equipment 30 relates to copyright protection.If the HDCP corresponding device then enters step n6, carry out the HDCP authentication processing.Then, in step n7, remove the output shielding, export the HDMI signal with the output resolution ratio that step n4 determines.Then, in step n8, judge the change request whether HDMI signal output resolution ratio under the current HDMI signal output state is arranged in the menu selection from the user.If not change then enter step n9 is if having change then enter step n12.When output resolution ratio enters step n9 less than change, judge whether to have taken place the input hand-off process here.If can not confirm to import hand-off process, the output that then enters the HDMI signal recovers (shielding is removed) step n7; If can confirm, then enter step n10.Among the step n10 that when the affirmation output resolution ratio does not change and the input hand-off process has taken place, enters, carry out the output shielding of HDMI signal.Then, in step n11, implement the format conversion (generation of second video data and HDMI signal) of first video data after, the output that enters the HDMI signal recovers (shielding is removed) step n7.The time interval of the output shielding of enforcement HDMI signal is equivalent to the Tf interval among Fig. 2 among the step n10.In step n8, judge output resolution ratio (resolution of HDMI signal) when change is arranged, enter step n12.In step n12, stop the output of HDMI signal.Stop the output of HDMI signal at step n12 after, return the input of step n3 and prepare to judge, export setting (step n4) once more.By implementing above program 24, when the input hand-off process, output image was exported by moment.In addition, after the output of HDMI signal stops among the execution in step n12, also can go to the output set handling of step n4.In addition, even there is not the structure of encryption equipment 15, authenticate if from the flow chart of Fig. 5, omit the HDCP of step n5 HDCP corresponding and step n6, then with above-mentioned effectively same.Have, CPU3 also can be positioned at HDMI dispensing device 10 again, and HDMI dispensing device 10 also can be realized by hardware such as LSI.Therefore, CPU3 and HDMI dispensing device 10 also can be realized by a chip.
(the 3rd execution mode)
Even third embodiment of the invention relate to the color space of first video data change also do not carry out and receiving equipment between the HDMI dispensing device of this form of re-authentication.The HDMI dispensing device here has the video transmission concurrently and audio frequency sends.Fig. 3 shows the system construction drawing of the schematic configuration of the system that forms by the video/audio output apparatus A that comprises the HDMI dispensing device in the third embodiment of the invention with by the connected receiving equipment 30 of HDMI.Video/audio output apparatus A is connected by HDMI cable 40 with receiving equipment 30.First video data that HDMI dispensing device 10 in the video/audio output apparatus A will be imported and voice data synthesize and after generating the HDMI signal, this HDMI signal are sent to receiving equipment 30 via HDMI cable 40.
The video/audio output apparatus A of present embodiment comprises: tuner 1, DVD driver 2, built-in CPU3 and the HDMI dispensing device 10 of B/E LSI.HDMI dispensing device 10 comprises: video input unit 11, audio frequency loader 12, format converter 13, HDMI transducer 23, first clock generator 17, register 18, internal oscillator (OSC) 19 and second clock maker 20.HDMI transducer 23 comprises: CS transducer 22, video/audio synthesizer 14, encryption equipment 15 and HDMI follower 16.
Be imported into video input unit 11 from tuner 1 or DVD driver 2 by first video data that CPU3 sends.The voice data of sending by CPU3 from tuner 1 or DVD driver 2 is imported into audio frequency loader 12.Format converter 13 by being converted to desirable resolution from first video data of video input unit 11 outputs, generates second video data.CS transducer 22 will be exported after its color space of conversion is desirable output color space by second video data that format converter 13 provides.Video/audio synthesizer 14, second video data after will being changed by the color space that CS transducer 22 provides is synthetic synchronously with the voice data that is provided by audio frequency loader 12.Encryption equipment 15 adds the video/audio generated data that crammed video/audio synthesizer 14 synthesizes.HDMI follower 16, the video/audio generated data that the process of encryption equipment 15 outputs is encrypted is converted to the HDMI signal, the HDMI signal after the output conversion of outside.First clock generator 17, according to being input to the first clock signal C K0 of video input unit 11 synchronously with first video data, generation offers format converter 13, CS transducer 22 and video/audio synthesizer 14 with the second clock signal CK1 that generates after having second clock signal CK1 with the resolution respective frequencies of carrying out second video data after the conversion of resolution by format converter 13.Register 18 receives the request that is provided with from CPU3, switches the operator scheme of each several part.Second clock maker 20, according to oscillator signal Sf from oscillator 19 outputs, generation has with behind the 3rd clock signal C K2 of the resolution respective frequencies of the HDMI signal of HDMI follower 16 output, and the 3rd clock signal C K2 that generates is offered CS transducer 22, video/audio synthesizer 14, encryption equipment 15 and HDMI follower 16.The 31st, be built in the HDMI receiving system of receiving equipment 30.
In input such as the switching between DVD driver 2 and tuner 1, the replacing of the variety classes DVD hand-off process, the input resolution, the color space that are input to first video data of video input unit 11 change sometimes.The color space of second video data that CS transducer 22 will be imported is converted to desirable color space.Color space conversion for example has the conversion of rgb signal (input) → YCbCr signal (output), perhaps the conversion of YCbCr signal (input) → rgb signal (output) etc.
Can change relatively with the resolution/color space of first video data, the resolution of HDMI signal (second video data) is fixed.Therefore, the input resolution (resolution of first video data) that changes need be converted to fixing output resolution ratio (resolution of HDMI signal (second video data)).In order to carry out this conversion, format converter 13 is set.The input resolution that format converter 13 will change is changed according to output resolution ratio fixing in the HDMI follower 16.
(YCbCr → RGB), the highway width of second video data changes according to the highway width of first video data usually when generating second video data at the color space that switches first video data.Therefore, first vision signal also can instantaneous interruption.But if carry out the structure that HDMI signal (second video data) is exported as the 3rd fixing clock signal of the described basis of present embodiment, even the highway width of input changes so, the second clock signal can not influence the 3rd clock signal yet.Therefore, can export HDMI signal (second video data) moment.
The result, during input such as the switching between DVD driver 2 and tuner 1, the replacing of variety classes DVD hand-off process, even the resolution/color space of first video data changes because of this input hand-off process, the resolution of second video data, HDMI signal can not change yet.Therefore, annexation between HDMI dispensing device 10 and the receiving equipment 30 and authentication relationship can not produce and not match.So, needn't carry out from the output of HDMI dispensing device 10 and stop to the HDMI of receiving equipment 30 signal, no longer need output to recover and re-authentication.Therefore, when the input hand-off process, can produce image rapidly and not and realize importing hand-off process mussily.That is, eliminated in the past, can export the image after the switching moment to stand-by period several seconds of switching till the back image is exported once more.
Below, (the time sequential routine of RGB → YCbCr) when the input color space of the video/audio output apparatus A of the present embodiment that as above constitutes with reference to figure 8 explanation switches.In the following description, suppose that first video data that is provided by DVD driver 2 is input to video input unit 11 with color space (rgb signal) before the input hand-off process, and through exporting from HDMI follower 16 after the predetermined process.
When the color space of first video data switched because of change DVD etc. in DVD driver 2, CPU3 imported hand-off process to register 18 requests, and the output of notice HDMI follower 16HDMI signal shields (P1).Then, CPU3 imports hand-off process (RGB → YCbCr) (P2).Then, CPU3 notice register 18 color space that is input to second video data of CS transducer 22 has the change of RGB → YCbCr.In view of the above, CS transducer 22 will be changed to be provided with and change to YCbCr → YCbCr (P3) from RGB → YCbCr.Then, the releasing of the output of HDMI signal shielding is notified HDMI follower 16 (P4) via register 18.
In the present embodiment, the time interval Te till finishing dealing with to image switching is according to system and difference can shorten to hundreds of ms (subsidiary mentioning is the several seconds) under the prior art situation of Fig. 9.For from the switching of tuner 1 to DVD driver 2 also with above-mentioned effectively same.In addition, for CS transducer 22, because the color space (YCbCr) by second video data of CPU3 indication is fixed, so during from first video data of the color space of tuner 1 beyond 10 inputs of HDMI dispensing device have RGB, also with above-mentioned effectively same.Even when encryption equipment 15 always is in the OFF state, also with above-mentioned effectively same.
In addition, Fig. 1 is the structure with DVD driver 2 and tuner 1, even but DVD driver 2 is only arranged or the structure of tuner 1 is only arranged, also with above-mentioned effectively same.In addition, after color space with second video data has been shown in this example changes to YCbCr from RGB, in the HDMI signal, do not make the change switching of (being always YCbCr) of color space, even but after the color space of second video data changed to RGB from YCbCr, in the HDMI signal, do not make color space change (being always RGB) switching too.In addition, even make under the input color space situation consistent with output color space, for example import color space and be (RGB → YCbCr), output color space also is (during RGB → YCbCr), if according to the present invention the output intent of fixed clock, even changing, the highway width of input can not influence the output clock, so can export moment yet yet.
Below, be built in the operation of the program 24 of CPU3 with reference to the flowchart text of figure 5.Program 24 is stored in recording medium and is installed on CPU3.At first, in step n1, confirm that the HDMI dispensing device 10 of video/audio output apparatus A is in connection status with receiving equipment 30 by HDMI cable 40.Then, in step n2, obtain the EDID32 in the receiving equipment 30 and it is resolved.Then, in step n3, whether confirm that input at first video data is ready to complete back first video data and has been imported into HDMI dispensing device 10.Then, in step n4, select EDID by step n2 to resolve the highest resolution that obtains after, under this resolution, carry out the format conversion and the CS conversion of first video data, thereby after generating second video data, the HDMI signal that is in masked state begins output.In addition, the processing here also can select beyond the highest resolution, last time exported the resolution of selection by the user.Then, in step n5, differentiate the HDCP corresponding device whether receiving equipment 30 relates to copyright protection.If the HDCP corresponding device then enters step n6, carry out the HDCP authentication processing.Then, in step n7, remove the output shielding of HDMI signal, export HDMI signal (video/audio generated data) with the resolution that step n4 determines.Then, in step n8, judge under the image output state in the menu that the user implements is selected, whether output resolution ratio (particularly being the resolution of second video data, HDMI signal) has the change request.If not change then enter step n9 is if having change then enter step n12.When output resolution ratio enters step n9 less than change,, judge whether to have taken place the input hand-off process here.If can not confirm to import hand-off process, then enter image output and recover (shielding is removed) step n7; If can confirm, then enter step n10.Among the step n10 that when the affirmation output resolution ratio does not change and the input hand-off process has taken place, enters, carry out the output shielding of HDMI signal.Then, in step n11, carry out format conversion with output CS conversion and after generating second video data, the output that enters the HDMI signal recovers (shielding releasing) step n7.The time interval of implementing the output shielding among the step n10 is equivalent to the Te interval of Fig. 8.When in step n8, judging output resolution ratio change being arranged, enter step n12.In step n12, stop the output of HDMI signal.Stop the output of HDMI signal at step n12 after, return the input of step n3 and prepare to judge, export setting (step n4) once more.
When importing hand-off process, can carry out image output moment by this program.In addition, after the output of the HDMI signal of step n12 stopped, the output resolution ratio that also can go to step n4 was determined.In addition, even there is not the structure of encryption equipment 15, authenticate if from the flow chart of Fig. 5, omit the HDCP of step n5 HDCP corresponding and step n6, then also with above-mentioned effectively same.In addition, CPU3 also can be positioned at HDMI dispensing device 10, and HDMI dispensing device 10 also can be realized by hardware such as LSI.Therefore, CPU3 and HDMI dispensing device 10 also can be realized by a chip.
More than the present invention is described in detail with regard to its most preferred object lesson, and the combination and permutation of the each several part of relevant its preferred implementation can be carried out various changes under the prerequisite of not violating the spirit of the present invention of asking the back and protection range.
Claims (13)
1, a kind of video/audio output apparatus comprises:
Video input unit is imported first video data and first clock signal synchronous with described first video data;
Format converter carries out conversion of resolution to described first video data that is input to described video input unit, generates second video data;
The HDMI transducer is converted to the HDMI signal with described second video data;
First clock generator according to described first clock signal that is input to described video input unit, generates the second clock signal have with the resolution respective frequencies of described second video data, and offers described format converter and described HDMI transducer; With
The second clock maker generates the 3rd clock signal have with the resolution respective frequencies of described HDMI signal, and offers described HDMI transducer,
Described format converter is converted to described second video data according to described first clock signal and described second clock signal with described first video data,
Described HDMI transducer is converted to described HDMI signal according to described second clock signal and described the 3rd clock signal with described second vision signal.
2, video/audio output apparatus according to claim 1, wherein, described HDMI transducer comprises:
Color space converter is converted to desirable color space with the color space of described second video data; With
The HDMI follower is converted to described HDMI signal with described second video data after the color space conversion,
Described second clock signal is provided for described format converter and described color space converter,
Described the 3rd clock signal is provided for described HDMI follower.
3, video/audio output apparatus according to claim 2 further comprises:
Receiving ability information obtains device, obtains its receiving ability information from the receiving equipment as the transmission purpose side of described HDMI signal;
The receiving ability resolver is resolved described receiving ability information and is obtained the described receiving ability information that device is obtained, and calculates the receivable ultimate resolution of described receiving equipment; With
Resolution is provided with device, and the described ultimate resolution that described receiving ability resolver is calculated is set in described format converter and the described HDMI follower.
4, video/audio output apparatus according to claim 2, wherein,
This video/audio output apparatus further comprises the audio frequency loader of input audio data;
Described HDMI transducer further comprises and synchronously described second video data and described voice data is synthesized with described the 3rd clock signal and generate the video/audio synthesizer of video/audio generated data;
Described HDMI follower is converted to described HDMI signal with described video/audio generated data.
5, video/audio output apparatus according to claim 2, wherein,
Described HDMI transducer further comprises the encryption equipment of described second video data being encrypted with described second clock signal Synchronization;
Described HDMI follower will be converted to described HDMI signal through described second video data of encrypting.
6, video/audio output apparatus according to claim 4, wherein,
Described HDMI transducer further comprises the encryption equipment of synchronously described video/audio generated data being encrypted with described the 3rd clock signal;
Described HDMI follower will be converted to described HDMI signal through the described video/audio generated data of encrypting.
7, the control method of the described video/audio output apparatus of a kind of claim 2 may further comprise the steps:
When described video input unit generation is switched with the input of described first video data of change resolution, before described first video data after the switching is exported from described video input unit, described HDMI follower is carried out the output shielding indication of described HDMI signal;
Described first video data after switching from the output of described video input unit;
According to described first video data after the switching of described video input unit output, by described format converter generate have with the switching that generates according to described first video data before switching before the switching of the described second video data equal resolution after described second video data; With
After the output shielding of removing described HDMI follower, according to described second video data after switching, by described HDMI signal and the output after the described HDMI follower generation switching.
8, the control method of the described video/audio output apparatus of a kind of claim 5 may further comprise the steps:
When described video input unit generation is switched with the input of described first video data of change resolution, before described first video data after the switching is exported from described video input unit, described HDMI follower is carried out the output shielding indication of described HDMI signal;
Described first video data after switching from the output of described video input unit;
According to described first video data after the switching of described video input unit output, by described format converter generate have with the switching that generates according to described first video data before switching before the switching of the described second video data equal resolution after described second video data;
By described second video data after the described encryption equipment encryption switching; With
After the output of removing described HDMI follower shields,, also export by the described HDMI signal that described HDMI follower generates after switching according to described second video data after the switching of process encryption.
9, the control method of the described video/audio output apparatus of a kind of claim 6 may further comprise the steps:
When described video input unit generation is switched with the input of described first video data of change resolution, before described first video data after the switching is exported from described video input unit, described HDMI follower is carried out the output shielding indication of described HDMI signal;
Described first video data after switching from the output of described video input unit;
According to described first video data after the switching of described video input unit output, by described format converter generate have with the switching that generates according to described first video data before switching before the switching of the described second video data equal resolution after described second video data;
By described video/audio synthesizer, synchronously described second video data and described voice data after switching are synthesized with described the 3rd clock signal, generate the described video/audio generated data after switching;
By the described video/audio generated data after the described encryption equipment encryption switching; With
After the output of removing described HDMI follower shields,, also export by the described HDMI signal that described HDMI follower generates after switching according to the described video/audio generated data after the switching of process encryption.
10, the control method of the described video/audio output apparatus of a kind of claim 2 may further comprise the steps:
When described video input unit generation is switched with the input of described first video data of color space variation, before described first video data after the switching is exported from described video input unit, described HDMI follower is carried out the output shielding indication of described HDMI signal;
Described first video data after switching from the output of described video input unit;
According to described first video data after the switching of described video input unit output, by described color space converter generate have with the switching that generates according to described first video data before switching before the switching in the described second video data same hue space after described second video data; With
After the output shielding of removing described HDMI follower, according to described second video data after switching, by described HDMI signal and the output after the described HDMI follower generation switching.
11, the control method of the described video/audio output apparatus of a kind of claim 5 may further comprise the steps:
When described video input unit generation is switched with the input of described first video data of color space variation, before described first video data after the switching is exported from described video input unit, described HDMI follower is carried out the output shielding indication of described HDMI signal;
Described first video data after switching from the output of described video input unit;
According to described first video data after the switching of described video input unit output, by described color space converter generate have with the switching that generates according to described first video data before switching before the switching in the described second video data same hue space after described second video data;
By described second video data after the described encryption equipment encryption switching; With
After the output of removing described HDMI follower shields,, also export by the described HDMI signal that described HDMI follower generates after switching according to described second video data after the switching of process encryption.
12, the control method of the described video/audio output apparatus of a kind of claim 6 may further comprise the steps:
When described video input unit generation is switched with the input of described first video data of color space variation, before described first video data after the switching is exported from described video input unit, described HDMI follower is carried out the output shielding indication of described HDMI signal;
Described first video data after switching from the output of described video input unit;
According to described first video data after the switching of described video input unit output, by described color space converter generate have with the switching that generates according to described first video data before switching before the switching in the described second video data same hue space after described second video data;
By described video/audio synthesizer, synchronously described second video data and described voice data after switching are synthesized with described the 3rd clock signal, generate the described video/audio generated data after switching;
By the described video/audio generated data after the described encryption equipment encryption switching; With
After the output of removing described HDMI follower shields,, also export by the described HDMI signal that described HDMI follower generates after switching according to the described video/audio generated data after the switching of process encryption.
13, a kind of resolution conversion method may further comprise the steps:
Import first video data and first clock signal synchronous with described first video data;
Described first video data is carried out conversion of resolution, generate second video data;
Described second video data is converted to the HDMI signal;
According to described first clock signal, generate the second clock signal have with the resolution respective frequencies of described second video data; With
Generation has the 3rd clock signal with the resolution respective frequencies of described HDMI signal,
Described second video data is being converted in the step of described HDMI signal, is changing described HDMI signal according to described the 3rd clock signal.
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| JP2009100456A (en) | 2009-05-07 |
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