CN103517005A - Integrated wireless audio and video transmission chip and transmission method thereof - Google Patents
Integrated wireless audio and video transmission chip and transmission method thereof Download PDFInfo
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Abstract
The invention relates to an integrated wireless audio and video transmission chip and a transmission method thereof. The integrated wireless audio and video transmission chip includes a channel transmission processor used for processing audio and video signals according to digital television transmission standards, and a transmission front-end which is used for processing the audio and video signals which have been processed by the channel transmission processor so as to obtain radio frequency signals according to radio frequency signal target frequency, wherein the channel transmission processor and the transmission front-end are integrated in a single integrated circuit. The transmission method of the integrated wireless audio and video transmission chip includes the following steps that: the audio and video signals are processed according to the digital television transmission standards; and the processed audio and video signals are further processed according to the radio frequency signal target frequency, such that the radio frequency signals can be obtained. All the above steps are accomplished in a single integrated circuit. With the integrated wireless audio and video transmission chip and the transmission method thereof of the invention adopted, low-power and low-cost wireless audio and video transmission can be realized.
Description
Technical field
The present invention relates to microelectronic, relate in particular to a kind of integrated wireless audio frequency and video transmitting chip and launching technique thereof.
Background technology
Compare with traditional simulated television, Digital Television has unrivaled advantage, as high in the availability of frequency spectrum, good confidentiality and interactive operation etc.In order efficiently to utilize valuable Radio Resource, simulated television is all carried out to the conversion of Digital Television in countries in the world in full preparation, stops broadcasting anolog TV signals, changes broadcast digital television signal; And various countries are national analog-to-digital conversion work and are provided with a final time point.Therefore, can say, Digital Television is trend of the times.Based on Ci， television set production firm, gradually various terrestrial DTV receiving equipments are built in Digital Television, can be user-friendly to, the puzzlement that also can avoid Set Top Box to bring.Certain ， certain areas, Set Top Box also has compare great market.In any case but apparatus of digital television receiving is extensively present in average family.On the other hand, at present, many families not only have television set, also have the home audio-visual devices such as computer, DVD, game machine, blue light player, karaoke OK system.People often need the audio frequency and video on computer to be for example sent to television for play, to obtain more comfortable user, experience; Certainly, people also usually need the audio-video frequency content on miscellaneous equipment (as DVD, game machine, blue light player, karaoke OK system etc.) to be sent on television set and to play.If all connected with cable between equipment, family will be in disorder.Therefore, in recent years, people hanker after adopting Radio Transmission Technology to come place of cable to connect.
As shown in Figure 1, be the framework schematic diagram of wireless digital television transmitter in prior art, transmitting set mainly comprises: single frequency adapter 11, baseband modulation plate 12, exciter 13 and high power amplifier 14.Wherein, single frequency adapter 11 utilizes gps timing information to realize time synchronized and the Frequency Synchronization of different transmitters in single frequency network, baseband modulation plate 12 is realized baseband modulation function, and exciter 13 utilizes analog circuit to realize upconversion process, and high power amplifier 14 amplifies the signal of exciter 13 outputs.Generally, the power output of high power amplifier 14 can reach several hectowatts or several kilowatts.
The transmitting power of existing wireless digital television transmitter is larger, and cost is higher.
Summary of the invention
The invention provides a kind of integrated wireless audio frequency and video transmitting chip and launching technique thereof, in order to realize low-power, wireless audio and video transmitting cheaply.
The invention provides a kind of integrated wireless audio frequency and video transmitting chip, it is characterized in that, comprising:
Transmission processor, for according to digital television transfer standard, processes audio-video signal;
Front end of emission, for according to radiofrequency signal target frequency, processes the audio-video signal after described transmission processor processing, obtains radiofrequency signal;
Wherein, described transmission processor and described front end of emission are integrated in single integrated circuit.
The present invention also provides a kind of equipment with integrated wireless audio frequency and video transmitting chip, it is characterized in that, comprising:
Radiofrequency signal output antenna or antennal interface;
Integrated wireless audio frequency and video transmitting chip, is connected with described radiofrequency signal output antenna or antennal interface, comprising:
Transmission processor, for according to digital television transfer standard, processes audio-video signal;
Front end of emission, for according to radiofrequency signal target frequency, processes the audio-video signal after described transmission processor processing, obtains radiofrequency signal;
Wherein, described transmission processor and described front end of emission are integrated in single integrated circuit.
The present invention also provides a kind of launching technique of integrated wireless audio frequency and video transmitting chip, it is characterized in that, comprising:
According to digital television transfer standard, audio-video signal is processed;
According to radiofrequency signal target frequency, the audio-video signal after processing is processed, obtain radiofrequency signal;
Wherein, above-mentionedly in single integrated circuit, complete in steps.
In the present invention, because transmission processor and front end of emission are integrated in single integrated circuit, and the transmitting power of integrated circuit is very little and cost is lower, thereby has realized low-power, wireless audio and video transmitting cheaply.
Accompanying drawing explanation
Fig. 1 is the framework schematic diagram of wireless digital television transmitter in prior art;
Fig. 2 is the structural representation of integrated wireless audio frequency and video transmitting chip of the present invention the first embodiment;
Fig. 3 is the schematic flow sheet of the launching technique embodiment of the transmitting chip of integrated wireless audio frequency and video shown in Fig. 2;
Fig. 4 is the structural representation of integrated wireless audio frequency and video transmitting chip of the present invention the second embodiment;
Fig. 5 is the schematic flow sheet of the launching technique embodiment of the transmitting chip of integrated wireless audio frequency and video shown in Fig. 4;
Fig. 6 is the structural representation of integrated wireless audio frequency and video transmitting chip of the present invention the 3rd embodiment;
Fig. 7 is the structural representation of DDS in integrated wireless audio frequency and video transmitting chip the 3rd embodiment of the present invention;
Fig. 8 is the schematic flow sheet of the launching technique embodiment of the transmitting chip of integrated wireless audio frequency and video shown in Fig. 6;
Fig. 9 is the structural representation of integrated wireless audio frequency and video transmitting chip of the present invention the 4th embodiment;
Figure 10 is the schematic flow sheet of the launching technique embodiment of the transmitting chip of integrated wireless audio frequency and video shown in Fig. 9;
Figure 11 is the structural representation that the present invention has the apparatus embodiments of integrated wireless audio frequency and video transmitting chip.
Embodiment
Below in conjunction with specification drawings and specific embodiments, the invention will be further described.
Integrated wireless audio frequency and video transmitting chip the first embodiment
As shown in Figure 2, be the structural representation of integrated wireless audio frequency and video transmitting chip of the present invention the first embodiment, can comprise transmission processor 21 and front end of emission 22, wherein, transmission processor 21 and front end of emission 22 are integrated in single integrated circuit.
As shown in Figure 3, the schematic flow sheet for the launching technique embodiment of the audio frequency and video of integrated wireless shown in Fig. 2 transmitting chip, can comprise the steps:
Step 32, front end of emission 22, according to radiofrequency signal target frequency, are processed the audio-video signal after processing, and obtain radiofrequency signal.
In the present embodiment, because transmission processor 21 and front end of emission 22 are integrated in single integrated circuit, and the transmitting power of integrated circuit is very little and cost is lower, thereby has realized low-power, wireless audio and video transmitting cheaply.
Because the power of the integrated wireless audio frequency and video transmitting chip of the present embodiment is very little and cost is lower, therefore can in private scope (personal range), carry out wireless audio and video transmitting, for example: in home-ranges or within the scope of 100 meters or within the scope of 200 meters or within the scope of 300 meters, carry out wireless audio and video transmitting.
In the present embodiment, the digital television transfer standard that transmission processor 21 adopts can comprise derivatives or the self-defined standard of ground digital television broadcast standard, mobile digital TV broadcast standard, digital video broadcast-satellite standard, above standard.For example: at least one in the ATSC standard of the DVB standard of Europe issue, U.S.'s issue, the DTMB standard of China's issue, the CMMB standard of China's issue and the ISDB standard of Japan's issue.In other words, in the present embodiment, transmission processor 21 can be supported single standard chnnel coding, also can support multi-standard channel coding, has higher performance.
In the present embodiment, integrated circuit can be used complementary metal oxide semiconductors (CMOS), and (Complementary Metal-Oxide Semiconductor is called for short: CMOS) technique, BiCMOS technique or any other want the technique that adopts or the combination of technique to manufacture.The package area of integrated circuit is less than or equal to 1600 square millimeters, and the packaging height of integrated circuit is less than or equal to 5 millimeters.For example: (Quad Flat Package, is called for short: QFP) encapsulation volume of 256 pins is as follows: 28mm*28mm*3.5mm quad flat package; Slim QFP(Low profile QFP, is called for short: LQFP) encapsulation volume of 256 pins is as follows: 28mm*28mm*1.4mm; (Wafer Level Package, is called for short: WLP) encapsulation volume of 256 pins (pin-pitch=0.5mm) is as follows: 8mm*8mm*0.64mm wafer level packaging; (Ball Grid Array, is called for short: BGA) encapsulation volume of 256 pins (pin-pitch=1.0mm) is as follows: 17mm*17mm*1.76mm ball grid array; (Low-profile BGA is called for short: LBGA) encapsulation volume of 256 pins (pin-pitch=1.27mm) is as follows: 21mm*21mm*1.7mm thin pitch ball grid array.In addition, integrated circuit can be constructed such that the power of radiofrequency signal is less than or equal to 1 watt, even can be low to moderate several milliwatts, for example: 5 milliwatts, compared to the power output of hundreds of watts easily in prior art, the power output of this chip is very little, and lower powered feature has just been agreed with the demand of domestic. applications.
In the present embodiment, the frequency that front end of emission 22 can be constructed such that radiofrequency signal is in UHF wave band or VHF wave band.
Integrated wireless audio frequency and video transmitting chip the second embodiment
As shown in Figure 4, structural representation for integrated wireless audio frequency and video transmitting chip of the present invention the second embodiment, the present embodiment is comprising on the basis of transmission processor 21 and front end of emission 22, can also comprise controller 24, be connected with transmission processor 21, controller 24 is integrated in single integrated circuit together with front end of emission 22 with transmission processor 21.Controller 24 is for selecting digital television transfer standard.Controller 24 can adopt micro-control unit (Micro Controller Unit, be called for short: MCU) or digital signal processor (Digital Signal Processor is called for short: DSP) realize.
Referring to Fig. 4, the present embodiment, on the basis of transmission processor 21 and front end of emission 22, can also comprise power amplifier 23 again, is connected, and is integrated in single integrated circuit together with front end of emission 22 with transmission processor 21 with front end of emission 22.Power amplifier 23 is for carrying out power amplification to the radiofrequency signal of front end of emission 22 outputs.Radiofrequency signal through power amplification is carried out radio transmission again.Further, for the ease of application, it is adjustable that power amplifier 23 can be configured to power amplification gain, thereby can as required, suitable power amplification gain be set.Controller 24 can also be connected with power amplifier 23, for selecting the power amplification gain of power amplifier 23.
Referring to Fig. 4, controller 24 can also be connected with front end of emission 22 again, for selecting radiofrequency signal target frequency.
In the present embodiment, controller 24 can be configured to Programmable Logic Controller.
Referring to Fig. 4, in the present embodiment, front end of emission 22 can comprise digital to analog converter 221, local oscillated signal circuit for generating 222 and up-converter circuit 223 again.Digital to analog converter 221 is connected with transmission processor 21, and up-converter circuit 223 is connected with local oscillated signal circuit for generating 222 with digital to analog converter 221 respectively, and local oscillated signal circuit for generating 222 is connected with controller 24.
In the present embodiment, digital to analog converter 221 is converted into audio frequency and video analog signal for the audio-video signal after transmission processor 21 is processed; Local oscillated signal circuit for generating 222, for according to radiofrequency signal target frequency, generates local oscillated signal; Up-converter circuit 223 is for receiving audio frequency and video analog signal, local oscillated signal as input, using radiofrequency signal as output.
Wherein, up-converter circuit 223 can be configured to directly audio frequency and video analog signal is converted to radiofrequency signal, also can be configured to first audio frequency and video analog signal to be converted to intermediate-freuqncy signal through frequency-conversion processing at least one times, then intermediate-freuqncy signal is converted into radiofrequency signal.
Further, again referring to Fig. 4, local oscillated signal circuit for generating 222 can comprise frequency synthesizer 2221 and driver (buffer) 2222, the input of driver 2222 is connected with the output of frequency synthesizer 2221, the output of driver 2222 is connected with up-converter circuit 223, and the input of frequency synthesizer 2221 is connected with controller 24.Frequency synthesizer 2221, according to radiofrequency signal target frequency, is exported the local oscillated signal of expected frequency, and the local oscillated signal of 2222 pairs of frequency synthesizers of driver, 2221 outputs amplifies.Frequency synthesizer 2221 can adopt various structures to realize, for example: the vibration that phase-locked loop (PLL), frequency locking change (FLL) or other expectations produces circuit.
In the present embodiment, transmission processor 21 can be configured to export I road signal and Q road signal, and digital to analog converter 221 is configured to I road signal to be converted to I road analog signal, and Q road signal is converted to Q road analog signal; Wherein, digital to analog converter 221 can adopt time-multiplexed mode that I road signal is converted to I road analog signal, and Q road signal is converted to Q road analog signal; In addition, digital to analog converter 221 can comprise two digital to analog converters, and one of them digital to analog converter is converted to I road analog signal by I road signal, and another digital to analog converter is converted to Q road analog signal by Q road signal.Local oscillated signal circuit for generating 222 is configured to generate the first local oscillated signal and the second local oscillated signal, and the first local oscillated signal is identical from the frequency of the second local oscillated signal, phase place is different; Preferably, the first local oscillated signal is spent with the phase phasic difference 90 of the second local oscillated signal, and alternatively, the first local oscillated signal is spent with the phase phasic difference 120 of the second local oscillated signal.Up-converter circuit 223 is configured to receive I road analog signal, Q road analog signal, the first local oscillated signal, the second local oscillated signal as input, using radiofrequency signal as output.
Again referring to Fig. 4, in order to produce the first local oscillated signal and the second local oscillated signal, local oscillated signal circuit for generating 222 can also comprise phase shifter 2223, be connected between frequency synthesizer 2221 and driver 2222, for the local oscillated signal of frequency synthesizer 2221 outputs is entered to horizontal phasing control, obtain the first local oscillated signal and the second local oscillated signal.
As shown in Figure 5, for the schematic flow sheet of the launching technique embodiment of the audio frequency and video of integrated wireless shown in Fig. 4 transmitting chip, on the basis of schematic flow sheet shown in Fig. 3, before step 31, can comprise the steps:
Before step 32, can comprise the steps:
Step 32 can comprise the steps:
Audio-video signal after step 321, digital to analog converter 221 are processed transmission processor 21 is converted into audio frequency and video analog signal;
Wherein, between step 321 and step 322, there is no strict sequential relationship, after step 323 is positioned at step 321 and step 322, before step 52 is positioned at step 322.
In step 323, up-converter circuit 223 can be converted to radiofrequency signal by audio analog signals through a mixing, also can first audio frequency and video analog signal and local oscillated signal be carried out to mixing, generates intermediate-freuqncy signal, again intermediate-freuqncy signal and local oscillated signal are carried out to mixing, radio frequency signal generation.
When the audio-video signal after transmission processor 21 is processed comprises I road signal and Q road signal, in step 321, digital to analog converter 221 is converted to I road analog signal by I road signal, and Q road signal is converted to Q road analog signal; In step 322, local oscillated signal circuit for generating 222, according to radiofrequency signal target frequency, generates the first local oscillated signal and the second local oscillated signal, and the first local oscillated signal is identical from the frequency of the second local oscillated signal, phase place is different; In step 323, up-converter circuit 223 carries out mixing, radio frequency signal generation by I road analog signal and Q road analog signal and the first local oscillated signal and the second local oscillated signal.
Referring to Fig. 5, after step 323, can also comprise the steps: again
Alternatively, before step 54, can also comprise the steps:
Integrated wireless audio frequency and video transmitting chip the 3rd embodiment
As shown in Figure 6, structural representation for integrated wireless audio frequency and video transmitting chip of the present invention the 3rd embodiment, be with the difference of structural representation shown in Fig. 4, front end of emission 22 can comprise that (Direct Digital Synthesizer is called for short: DDS) 224 the first Direct Digital Synthesizer.The one DDS 224 is connected with transmission processor 21.The one DDS 224 is also connected with control circuit 24.
The one DDS 224 is for the audio-video signal after processing according to radiofrequency signal target frequency and transmission processor 21, radio frequency signal generation.
DDS is a kind of frequency synthesis technique from the directly synthetic required waveform of phase place concept.As shown in Figure 7, the structural representation for DDS in integrated wireless audio frequency and video transmitting chip the 3rd embodiment of the present invention, can comprise the phase accumulator 71, adder 72, wave memorizer 73, digital to analog converter 221 and the low pass filter 74 that are connected in series successively.
Phase accumulator 71 is at clock signal f
ccontrol under with frequency control word K, add up, output N position binary code and Waveform Control word W in adder 72, be added after as wave memorizer 73 address, wave memorizer 73 is carried out to addressing, wave memorizer 73 output amplitude code S (n), amplitude code S (n) becomes staircase waveform S (t) through digital to analog converter 221, more just can obtain synthetic signal waveform after low pass filter 74 is level and smooth.Synthetic signal waveform shape depends on the amplitude code of depositing in wave memorizer 73, therefore with DDS, can produce random waveform.Wave memorizer 73 can adopt ROM.
K is called as frequency control word, is also phase increment.DDS equation is f0=f
ck/2
n, f0 is output frequency, f
cfor clock frequency, N is the word length of phase accumulator 71.When K=1, DDS output low-limit frequency (being also frequency resolution) is f
c/ 2
n, and the maximum output frequency of DDS is by the decision of Nyquist (Nyquist) sampling thheorem, i.e. f
c/ 2, the maximum that is to say K is 2
n-1.Therefore,, as long as N is enough large, DDS can obtain very thin frequency interval.Change the output frequency of DDS, as long as change frequency control word K.
In the present embodiment, radiofrequency signal target frequency can be used as frequency control word K, and the audio-video signal after transmission processor 21 is processed can be used as Waveform Control word W.
In the present embodiment, DDS 224 plays warbled effect, and the audio-video signal after transmission processor 21 is processed is modulated to the radiofrequency signal of target frequency.
DDS has the features such as low cost, low-power consumption, high-resolution and conversion speed be fast, makes the cost of chip lower, makes the performance of chip higher simultaneously.
As shown in Figure 8, the schematic flow sheet for the launching technique embodiment of the audio frequency and video of integrated wireless shown in Fig. 6 transmitting chip, is with the difference of schematic flow sheet shown in Fig. 5, and step 321-step 323 can replace with following steps:
After step 81 is positioned at step 52.
Integrated wireless audio frequency and video transmitting chip the 4th embodiment
As shown in Figure 9, structural representation for integrated wireless audio frequency and video transmitting chip of the present invention the 4th embodiment, be with the difference of structural representation shown in Fig. 4, front end of emission 22 can comprise the 2nd DDS 225, local oscillated signal circuit for generating 222 and up-converter circuit 223, the 2nd DDS 225 is connected with transmission processor 21, and up-converter circuit 223 is connected with local oscillated signal circuit for generating 222 with the 2nd DDS 225.
In the present embodiment, the 2nd DDS 225 is converted into medium and low frequency analog audio-video signal for the audio-video signal after transmission processor 21 is processed; Local oscillated signal circuit for generating 222, for according to radiofrequency signal target frequency, generates local oscillated signal; Up-converter circuit 223 is for receiving medium and low frequency analog audio-video signal, local oscillated signal as input, using radiofrequency signal as output.
Wherein, in the 2nd DDS 225, referring to Fig. 7, can control by frequency control word K the frequency of medium and low frequency analog audio-video signal, frequency control word K can be fixed value, can be also variable value.When frequency control word K is variable, the 2nd DDS can be connected with controller 24, and controller 24 is for arranging frequency control word K.
Local oscillated signal circuit for generating 222 can comprise frequency synthesizer 2221 and driver (buffer) 2222, the input of driver 2222 is connected with the output of frequency synthesizer 2221, the output of driver 2222 is connected with up-converter circuit 223, and the input of frequency synthesizer 2221 is connected with controller 24.Frequency synthesizer 2221, according to radiofrequency signal target frequency, is exported the local oscillated signal of expected frequency, and the local oscillated signal of 2222 pairs of frequency synthesizers of driver, 2221 outputs amplifies.Frequency synthesizer 2221 can adopt various structures to realize, for example: the vibration that phase-locked loop (PLL), frequency locking change (FLL) or other expectations produces circuit.
As shown in figure 10, the schematic flow sheet for the launching technique embodiment of the audio frequency and video of integrated wireless shown in Fig. 9 transmitting chip, is with the difference of schematic flow sheet shown in Fig. 5, and step 321-323 can replace with following steps:
Wherein, between step 101 and step 102, there is no strict sequential relationship, after step 103 is positioned at step 101 and step 102, before step 52 is positioned at step 102.
The apparatus embodiments with integrated wireless audio frequency and video transmitting chip
As shown in figure 11, for the present invention has the structural representation of the apparatus embodiments of integrated wireless audio frequency and video transmitting chip, comprise radiofrequency signal output antenna or antennal interface 111 and integrated wireless audio frequency and video transmitting chip 112, integrated wireless audio frequency and video transmitting chip 112 is connected with radiofrequency signal output antenna or antennal interface 111.Wherein, radiofrequency signal output antenna or antennal interface 111 refer to this equipment can comprise radiofrequency signal output antenna, also can only include radiofrequency signal output antennal interface.Integrated wireless audio frequency and video transmitting chip 82 can, for the chip in aforementioned integrated wireless audio frequency and video transmitting chip the first embodiment, the second embodiment or the 3rd embodiment, not repeat them here.
Wherein, send to the audio-video signal of integrated wireless audio frequency and video transmitting chip 112 itself to be obtained by this portable equipment, for example: the camera and the microphone that by portable equipment itself, carry obtain.The audio-video signal that sends to integrated wireless audio frequency and video transmitting chip 112 can be also to send to portable equipment by external equipment, and now, this portable equipment can also comprise audio-video signal input interface 113.Audio-video signal input interface 113 also can export antenna with radiofrequency signal or antennal interface 111 is realized multiplexing.
In the present embodiment, this equipment can be multimedia player, portable equipment, handheld device or vehicle mobile equipment.For example: portable notebook, cell phone, MP4 player, digital camera, Digital Video etc.
In the present embodiment, the volume of this equipment is less than or equal to 30000 cubic centimetres, and weight is less than or equal to 20 kilograms.For different equipment, volume and weight is different again.For example: for handheld device, its volume can reach: long be less than or equal to 15 centimetres, be widely less than or equal to 9 centimetres, height is less than or equal to 1 centimetre, and weight is less than or equal to 250 grams.For portable equipment, its volume can reach: long be less than or equal to 40 centimetres, be widely less than or equal to 30 centimetres, height is less than or equal to 4 centimetres, and weight is less than or equal to 3 kilograms.
Finally it should be noted that: above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not depart from the spirit and scope of technical solution of the present invention.
Claims (36)
1. an integrated wireless audio frequency and video transmitting chip, is characterized in that, comprising:
Transmission processor, for according to digital television transfer standard, processes audio-video signal;
Front end of emission, for according to radiofrequency signal target frequency, processes the audio-video signal after described transmission processor processing, obtains radiofrequency signal;
Wherein, described transmission processor and described front end of emission are integrated in single integrated circuit.
2. integrated wireless audio frequency and video transmitting chip according to claim 1, is characterized in that, described integrated circuit is used the manufacture of complementary metal oxide semiconductors (CMOS) (CMOS) technique.
3. integrated wireless audio frequency and video transmitting chip according to claim 1, it is characterized in that, described digital television transfer standard comprises derivatives or the self-defined standard of ground digital television broadcast standard, mobile digital TV broadcast standard, digital video broadcast-satellite standard, above standard.
4. integrated wireless audio frequency and video transmitting chip according to claim 3, it is characterized in that, described digital television transfer standard comprise Europe issue DVB standard, the ATSC standard of U.S.'s issue, the DTMB standard of China's issue, at least one in the ISDB standard of the CMMB standard of China's issue and Japan's issue.
5. integrated wireless audio frequency and video transmitting chip according to claim 1, is characterized in that, described front end of emission comprises:
Digital to analog converter, is converted into audio frequency and video analog signal for the audio-video signal after described transmission processor is processed;
Local oscillated signal circuit for generating, for according to described radiofrequency signal target frequency, generates local oscillated signal;
Up-converter circuit, for receiving described audio frequency and video analog signal, described local oscillated signal as input, using described radiofrequency signal as output.
6. integrated wireless audio frequency and video transmitting chip according to claim 5, is characterized in that, described up-converter circuit is configured to first described audio frequency and video analog signal is converted to intermediate-freuqncy signal, more described intermediate-freuqncy signal is converted into described radiofrequency signal.
7. integrated wireless audio frequency and video transmitting chip according to claim 5, it is characterized in that, described transmission processor is configured to export I road signal and Q road signal, described digital to analog converter is configured to described I road signal to be converted to I road analog signal, and described Q road signal is converted to Q road analog signal;
Described local oscillated signal circuit for generating is configured to generate the first local oscillated signal and the second local oscillated signal, and described the first local oscillated signal is identical from the frequency of described the second local oscillated signal, phase place is different;
Described up-converter circuit is configured to receive described I road analog signal, described Q road analog signal, described the first local oscillated signal, described the second local oscillated signal as input, using described radiofrequency signal as output.
8. integrated wireless audio frequency and video transmitting chip according to claim 5, is characterized in that, described local oscillated signal circuit for generating comprises:
Frequency synthesizer;
Driver, input is connected with the output of described frequency synthesizer, and output is connected with described up-converter circuit.
9. integrated wireless audio frequency and video transmitting chip according to claim 1, is characterized in that, described front end of emission comprises:
The first Direct Digital Synthesizer (DDS), for according to the audio-video signal after described radiofrequency signal target frequency and the processing of described transmission processor, generates described radiofrequency signal.
10. integrated wireless audio frequency and video transmitting chip according to claim 1, is characterized in that, described front end of emission comprises:
The second Direct Digital Synthesizer (DDS), is converted into medium and low frequency analog audio-video signal for the audio-video signal after described transmission processor is processed;
Local oscillated signal circuit for generating, for according to described radiofrequency signal target frequency, generates local oscillated signal;
Up-converter circuit, for receiving described medium and low frequency analog audio-video signal, described local oscillated signal as input, using described radiofrequency signal as output.
11. integrated wireless audio frequency and video transmitting chips according to claim 1, is characterized in that, also comprise:
Power amplifier, is connected with described front end of emission, for described radiofrequency signal is carried out to power amplification;
Described power amplifier is integrated in described single integrated circuit.
12. integrated wireless audio frequency and video transmitting chips according to claim 11, is characterized in that, it is adjustable that described power amplifier is configured to power amplification gain.
13. integrated wireless audio frequency and video transmitting chips according to claim 1, is characterized in that, also comprise:
Controller, is connected with described front end of emission, for selecting described radiofrequency signal target frequency;
Described controller is integrated in described integrated circuit.
14. integrated wireless audio frequency and video transmitting chips according to claim 11, is characterized in that, also comprise:
Controller, is connected with described power amplifier, for selecting the power amplification gain of described power amplifier;
Described controller is integrated in described integrated circuit.
15. integrated wireless audio frequency and video transmitting chips according to claim 1, is characterized in that, also comprise:
Controller, is connected with described transmission processor, for selecting described digital television transfer standard;
Described controller is integrated in described integrated circuit.
16. according to the arbitrary described integrated wireless audio frequency and video transmitting chip of claim 13-15, it is characterized in that, described controller is configured to Programmable Logic Controller.
17. integrated wireless audio frequency and video transmitting chips according to claim 1, is characterized in that, the package area of described integrated circuit is less than or equal to 1600 square millimeters, and the packaging height of described integrated circuit is less than or equal to 5 millimeters.
18. integrated wireless audio frequency and video transmitting chips according to claim 1, is characterized in that, described integrated circuit is constructed such that the power of described radiofrequency signal is less than or equal to 1 watt.
19. integrated wireless audio frequency and video transmitting chips according to claim 1, is characterized in that, described front end of emission is constructed such that the frequency of described radiofrequency signal is in UHF wave band or VHF wave band.
20. 1 kinds of equipment with integrated wireless audio frequency and video transmitting chip, is characterized in that, comprising:
Radiofrequency signal output antenna or antennal interface;
Integrated wireless audio frequency and video transmitting chip, is connected with described radiofrequency signal output antenna or antennal interface, comprising:
Transmission processor, for according to digital television transfer standard, processes audio-video signal;
Front end of emission, for according to radiofrequency signal target frequency, processes the audio-video signal after described transmission processor processing, obtains radiofrequency signal;
Wherein, described transmission processor and described front end of emission are integrated in single integrated circuit.
21. equipment according to claim 20, is characterized in that, described equipment is multimedia player, portable equipment, handheld device or vehicle mobile equipment.
22. equipment according to claim 20, is characterized in that, the volume of described equipment is less than or equal to 30000 cubic centimetres, and weight is less than or equal to 20 kilograms.
The launching technique of 23. 1 kinds of integrated wireless audio frequency and video transmitting chips, is characterized in that, comprising:
According to digital television transfer standard, audio-video signal is processed;
According to radiofrequency signal target frequency, the audio-video signal after processing is processed, obtain radiofrequency signal;
Wherein, above-mentionedly in single integrated circuit, complete in steps.
24. methods according to claim 23, is characterized in that, described integrated circuit is used the manufacture of complementary metal oxide semiconductors (CMOS) (CMOS) technique.
25. methods according to claim 23, it is characterized in that, described digital television transfer standard comprises derivatives or the self-defined standard of ground digital television broadcast standard, mobile digital TV broadcast standard, digital video broadcast-satellite standard, above standard.
26. methods according to claim 25, it is characterized in that, described digital television transfer standard comprise Europe issue DVB standard, the ATSC standard of U.S.'s issue, the DTMB standard of China's issue, at least one in the ISDB standard of the CMMB standard of China's issue and Japan's issue.
27. methods according to claim 23, is characterized in that, described according to radiofrequency signal target frequency, and the audio-video signal after processing is processed and obtained radiofrequency signal and comprise:
Audio-video signal after described processing is converted into audio frequency and video analog signal;
According to described radiofrequency signal target frequency, generate local oscillated signal;
Described audio frequency and video analog signal and described local oscillated signal are carried out to mixing, radio frequency signal generation.
28. methods according to claim 27, is characterized in that, described described audio frequency and video analog signal and described local oscillated signal are carried out to mixing, and radio frequency signal generation comprises:
Described audio frequency and video analog signal and described local oscillated signal are carried out to mixing, generate intermediate-freuqncy signal;
Described intermediate-freuqncy signal and described local oscillated signal are carried out to mixing, radio frequency signal generation.
29. methods according to claim 27, it is characterized in that, audio-video signal after described processing comprises I road signal and Q road signal, describedly audio-video signal after described processing is converted into audio frequency and video analog signal is specially: described I road signal is converted to I road analog signal, described Q road signal is converted to Q road analog signal;
Described according to described radiofrequency signal target frequency, generation local oscillated signal is specially: described according to described radiofrequency signal target frequency, generate the first local oscillated signal and the second local oscillated signal, described the first local oscillated signal is identical from the frequency of described the second local oscillated signal, phase place is different;
Described described audio frequency and video analog signal and described local oscillated signal are carried out to mixing, radio frequency signal generation is specially: described I road analog signal and described Q road analog signal and described the first local oscillated signal and described the second local oscillated signal are carried out to mixing, generate described radiofrequency signal.
30. methods according to claim 23, is characterized in that, described according to radiofrequency signal target frequency, and the audio-video signal after processing is processed, and obtain radiofrequency signal and comprise:
Adopt the first Direct Digital Synthesizer (DDS), the audio-video signal according to after described radiofrequency signal target frequency and described processing, generates described radiofrequency signal.
31. methods according to claim 23, is characterized in that, described according to radiofrequency signal target frequency, and the audio-video signal after processing is processed, and obtain radiofrequency signal and comprise:
Adopt the second Direct Digital Synthesizer (DDS), the audio-video signal after described processing is converted into medium and low frequency analog audio-video signal;
According to described radiofrequency signal target frequency, generate local oscillated signal;
Described medium and low frequency analog audio-video signal and described local oscillated signal are carried out to mixing, generate described radiofrequency signal.
32. methods according to claim 23, is characterized in that, also comprise:
Described radiofrequency signal is carried out to power amplification;
The step of described power amplification completes in described single integrated circuit.
33. methods according to claim 32, is characterized in that, described radiofrequency signal is carried out also comprising before power amplification:
Based on setting able to programme, select power amplification gain.
34. methods according to claim 23, is characterized in that, also comprise:
Based on setting able to programme, select described radiofrequency signal target frequency.
35. methods according to claim 23, is characterized in that, described according to digital television transfer standard, before audio-video signal is processed, also comprise:
Based on setting able to programme, select described digital television transfer standard.
36. methods according to claim 23, is characterized in that, the frequency of described radiofrequency signal is in UHF wave band or VHF wave band.
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| CN201210205237.4A CN103517005A (en) | 2012-06-18 | 2012-06-18 | Integrated wireless audio and video transmission chip and transmission method thereof |
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| CN201210205237.4A CN103517005A (en) | 2012-06-18 | 2012-06-18 | Integrated wireless audio and video transmission chip and transmission method thereof |
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