CN101548538A - Tuning device with diplexer input - Google Patents
Tuning device with diplexer input Download PDFInfo
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- CN101548538A CN101548538A CNA2006800565265A CN200680056526A CN101548538A CN 101548538 A CN101548538 A CN 101548538A CN A2006800565265 A CNA2006800565265 A CN A2006800565265A CN 200680056526 A CN200680056526 A CN 200680056526A CN 101548538 A CN101548538 A CN 101548538A
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Abstract
The present invention includes an apparatus for distributing a received modulated RF signal to a plurality of tuners including a diplexer device. The diplexer device includes a plurality of filter circuits adapted to direct respective portions of the received modulated RF the signal to respective tuner devices. In an illustrated embodiment, the tuner devices supply tuned signals to a picture in picture display device. Also disclosed is a method of receiving a modulated ready of frequency signal and routing portions of the received signal to respective tuner devices using filter devices in a diplexer or multiplexer configuration.
Description
Technical field
The present invention relates to a kind of video receiving method and device, relate more specifically to a kind of method and apparatus that is used for the signal route of video receiving apparatus.
Background technology
In recent years, radio frequency (RF) communication has become ubiquitous, and in the U.S. and overseas many areas, many RF signal sources have been created intensive signal environment.Simultaneously, the appearance of digital communication technology has proposed strict requirement, the characteristic of the signal that is received such as noise, sensitivity and dynamic range to the characteristic of the signal that received.Analog signal is tending towards more gently demoting than the digital signal that can decline suddenly.Therefore, Digital Television is a kind of digital communication technology that may require the signal specific characteristic at the receiver place.
Along with the raising of Digital Television popularization degree, the user may require to improve performance, and requires additional expediently the equipment from simulated television to switch to the required important input of Digital Television equipment.For example, the user may wish received television signal in fact uninterruptedly, and easily in conjunction with the additional assemblies such as set-top box (STB) equipment, personal video recorder (PVR), high definition (HD) receiver etc.
As everyone knows, transmit a plurality of information signals simultaneously by frequency division multiplex.For example, use a coaxial cable to carry hundreds of television channels simultaneously traditionally.In addition, individually surface antenna once can receive a plurality of signals.Described a plurality of signal can be derived from common source or be derived from the geographical multiple source that separates of going up.
Consumer demand has caused the function of expansion of TV receiving apparatus and the complexity of increase.For example, can obtain writing down the input television channel now and show that simultaneously second imports the receiving equipment of television channel, these two television channels all are to extract from the public RF signal that is received.
Also know: receive and write down a plurality of television channels simultaneously, and show a plurality of television channels simultaneously.For example, some consumers' TV comprises many image display capability now, such as: picture-in-picture (PIP) function, picture out picture (POP), picture shows (side by side picture display) or little picture array side by side.For example, the PIP function allows to show first vision signal on the first area of video display screen curtain, simultaneously in the first area of this screen inner or within second show second vision signal on than the zonule.
For explaining purpose of the present invention, below describe will be about the example PIP that comprises the PIP image many image display systems.Described system can be applicable to many picture systems of other type.When realizing these facilitating functions, knownly in single receiving system, use a plurality of tuner apparatus.For example, can use first tuner apparatus to come from the RF carrier signal, to extract main signal.The outputting video signal of this first tuner apparatus for example is used to create part or the first regional vision signal master image of representing display system on the video display screen curtain of PIP system.Can use second tuner apparatus to come extraction second or auxilliary picture signal from this RF carrier signal.The outputting video signal of this second tuner apparatus is used to create the auxilliary image section of the shown image of representative or second vision signal in zone.For example, in the PIP system, first or main video signal will be used to produce the main image region that PIP shows, and second vision signal will be used to produce the little auxilliary image that is inserted in the key frame, i.e. the PIP image.
In order to utilize a plurality of tuners to realize such as the PIP video display function and/or the multichannel function multichannel writes down simultaneously, each tuner must receive a part of input carrier signal.In traditional tuner system, generally use demultiplexer to realize input signal is divided into the appropriate section that is used for each tuner.
Demultiplexer is in the input port received signal and produces the equipment of output signals at two or more output ports.The output signal that produces at each outputs of described two or more outputs has and the substantially the same frequency content of input signal in the input end reception of demultiplexer.Dividing input signal between two outputs of passive signal splitter device causes the correspondence of signal power to be divided.Therefore, for passive signal splitter device, the total power output of output signal is not more than the power of input signal.Each output signal only comprises the part or the share of the power of original input signal.
For example, known before Signal Separation amplification input signal.Also known: one or more in the corresponding output signal of amplifying signal separator.Yet such amplification may be incorporated into the distortion of not expecting in the signal after the amplification.In addition, amplifying requirement uses additional assemblies and requirement that amplifying power is provided.The complexity and the cost of this common increase system.Therefore, expectation has a kind of so that the maximized mode of signal power that receives at each tuner place to separate input signal power between each tuner mode.
Summary of the invention
According to the present invention, divide input rf signal according to frequency, make to receive the signal in first frequency band and to receive signal in second frequency band by second tuner by first tuner.In one aspect of the invention, each tuner receives the most of power in its frequency band.These are different with the situation that adopts conventional separators.For conventional separators, each tuner receives the power on all frequencies, and does not have preferential power division in by the tuning frequency range of that tuner.
In one aspect, the present invention includes tuner system with a plurality of tuners and frequency demultiplexer.This frequency demultiplexer is assigned to a plurality of tuners with the modulated carrier signal that is received.This frequency demultiplexer receives an input signal, and produces two or more output signals.Different with the output signal of separator equipment, the output signal of this frequency demultiplexer has different frequency content basically.Therefore, for example, first output signal of this frequency demultiplexer comprises the corresponding lower band of carrier frequency, and second output signal of this frequency demultiplexer comprises the corresponding high frequency band of carrier frequency.
In one embodiment, lower band and high frequency band are incoherent mutually (orthogonal) basically, that is to say that the carrier frequency of finding in lower band does not exist in high frequency band basically, the carrier frequency of finding in high frequency band does not exist in lower band basically.
In one embodiment, the frequency of utilization demultiplexer comes the assigned modulation carrier signal to eliminate needs for demultiplexer equipment, and has realized than realizing the more efficient signal power division by demultiplexer.Therefore, in exemplary device, all basically power of finding in first channel of received signal all is passed to the signal input of first tuner, and all basically power of finding in second channel of received signal all is passed to the secondary signal input of second tuner.
Notice that as top traditional demultiplexer equipment is given each output with all frequencies basically of received signal with the power division that reduces.Therefore, each tuner only obtains the partial channel power of its channel that is tuned to, and is directed to another tuner then will is the signal power at useful frequency place if receive simultaneously and waste.Layout of the present invention is distributed to tuner with tuning signal from that channel with the most of signal energies in the specific channel.Therefore, can reduce or eliminate for amplification and input or output the demand of signal and cost and the degradation that is associated with this amplification.
Other advantage of the present invention and feature will become obvious from the following the detailed description and the accompanying drawings of setting forth the preferred embodiments of the present invention.
Description of drawings
Fig. 1 shows receiving system according to an embodiment of the invention with the block diagram form;
Fig. 2 shows the modulated carrier signal that comprises television channel as frequency domain figure;
Fig. 3 A-3C shows as the signal that is received of frequency domain figure and separator output signal;
Fig. 4 A-4B shows the output signal as the duplexer according to an embodiment of the invention of frequency domain figure;
Fig. 5 shows the illustrative circuitry of signal diplexer device according to an embodiment of the invention and represents;
Fig. 6 shows integrated circuit according to an embodiment of the invention with the block diagram form;
Fig. 7 shows the PIP system that comprises the signal diplexer device according to an embodiment of the invention with the block diagram form; And
Fig. 8 shows personal video recorder (PVR) system that comprises the signal diplexer device according to an embodiment of the invention.
Embodiment
In the following detailed description,, and in the accompanying drawings, show wherein by diagram and can implement specific embodiment of the present invention as the accompanying drawing of a part with reference to here.Fully describe these embodiment in detail so that make those skilled in the art can implement the present invention.Should be understood that and can utilize other embodiment, and can make under the situation without departing from the spirit and scope of the present invention structural, in logic with electric on change.
Fig. 1 illustrates signal tuning according to an embodiment of the invention system 100 with the block diagram form.This tuning system 100 comprises local RF signal input part 102.In illustrated embodiment, local RF signal input part is conductively coupled to ground-plane antenna equipment 104.The demand that depends on concrete system can comprise preamplifier equipment alternatively.
RF signal input part 102 is couple to the input 110 of frequency diplexer equipment 112.Diplexer device 112 comprises first filter segment 114 and second filter segment 116.Input 110 is couple to the corresponding first input end 118 and second input 120 of filter segment 114 and 116 simultaneously.
In illustrated embodiment, first filter segment 118 presents low-pass filter characteristic, and second filter segment 120 presents high pass filter characteristic.Yet, it will be understood by those skilled in the art that in various embodiment of the present invention and can advantageously adopt a variety of filter arrangement.For example, filter segment can comprise the filter segment with notch filter characteristic, the filter segment that has the filter segment of pass band filter characteristic and have the comb filter characteristic.
The tuner output 129 and 131 of first tuner apparatus 126 and second tuner apparatus 128 is couple to the corresponding first input end 132 and corresponding second input 134 of signal handling equipment 130.In various embodiment of the present invention, signal handling equipment for example comprises demodulator device, mpeg decoder equipment, output amplifier and/or as known in the art other signal handling equipment and system.
In illustrated example, the signal output part 136 of signal handling equipment 130 is couple to or serves as output 138 for tuning system 100.As illustrated, this output can be couple to the input 140 such as another equipment of video display apparatus 142.As below discussing in more detail, filter 114 and 116 can have fixing basically filter characteristic.In alternate embodiment, filter 114 and 116 can have adjustable filter characteristic.
Referring now to Fig. 1 and further next about the operation of the foregoing description discussion according to exemplary device of the present invention with reference to figure 2-6.Those skilled in the art will appreciate that for reduced representation Fig. 2 is by idealized.Fig. 2 shows the diagrammatic representation 200 of signal 202 in frequency domain that is received.The signal 202 that is received is such as the signal that can receive at the terrestrial receiving antenna place.Therefore, signal 202 can be by the composite signal of forming from a plurality of signals of discrete message source reception separately.
Tuning system is used to be received in the frequency within the bandwidth 204 that is limited by lower corner frequency (corner frequency) 206 and higher corner frequency 208.Within example bandwidth 204, can obtain a plurality of modulated channels.As illustrated, these modulated channels comprise first channel 210, second channel 212 and the 3rd channel 214.It will be understood by those skilled in the art that the bandwidth of the bandwidth that depends on tuning system and each channel 210,212,214 etc., each carrier frequency within bandwidth 204 can obtain many more channels.
According to one embodiment of present invention, as directed, the amplitude of the signal 202 that is received changes on the bandwidth 204 of receiver, makes each channel of the signal 202 received have time average amplitude separately, and for example 216,218,220.These amplitudes depend on the factor such as the characteristic of for example distance between antenna receiving feature, broadcasting power, broadcasting and the reception antenna and intermediate conveyor medium.Yet, it will be understood by those skilled in the art that other system configuration will cause substantially invariable signal amplitude on receiver bandwidth.
Tuner apparatus is tunable to detect the signal frequency in the specific channel (for example, 210).Typically, tuner apparatus has the response characteristic 205 that is adapted to be with the frequency basically identical of channel 210.The detected frequency of tuner is carried out demodulation be modulated onto channel information on the carrier signal 202 with extraction.The successful demodulation of channel information depends on the appearance of suitable power in input signal.The signal power that can be used for this tuner by 207 expressions of (the channel 210) area under the signal envelope curve that is positioned at signal 202.
Fig. 3 A illustrates two exemplary channels 210 and 212 of the signal 202 that received with the curve chart form.Exemplary channels 210 and 212 signals that carried have amplitude A and A ' separately.In traditional multiple tuner system, separate the signal 224 that is received by having the input that is used to receive the signal 202 that is received and the separator of two outputs.Fig. 3 B shows the example output signal of finding at first output of this separator 226 and 228.Fig. 3 C shows the example output signal of finding at second output of this separator 227 and 229.As shown in Fig. 3 B and 3C, each output of conventional separators receives the amplitude B, the B ' that still reduce that is included in all frequencies basically of finding in the signal 202 that is received, the signal of C, C '.
The output signal that can use one or more amplifier apparatus to amplify this separator, and recover the signal amplitude of loss thus.Such amplifier apparatus may be introduced distortion and signal noise, and has also increased the cost of the system that is produced.Therefore, the amplification of output signal may not expected.
In symmetrical splitter, the corresponding amplitude of output signal (B, C), (B ', C ') are respectively basic (for example, being respectively approximate A/2, A '/2) that equates.In the asymmetric separator, these amplitudes do not wait.Under any circumstance, output signal without the amplitude of amplifying all less than the corresponding amplitude of the signal 202 that is received.
When the output signal of separator is applied to the input of each self-tuner, the channel power that each tuner can be used is less than the available channel power in the signal that is received, as for example indicated by the area of comparing under the example signal envelope curve 226 with area 207 that reduces 230.
With reference now to Fig. 4 A and 4B,, see graphical representation at the available signal separately of output 119 and 121 places (as shown in Figure 1) of diplexer device 112 of the present invention.The carrier signal (as shown in Figure 3A) that diplexer device 112 of the present invention receives in two channels 210 and 212.
Shown in Fig. 4 A, this duplexer (is lower than frequencies omega with the frequency 238 of first scope
c) offer first output 119 (as shown in fig. 1).Shown in Fig. 4 B, this duplexer (is higher than frequencies omega with the frequency 240 of second scope
c) offer second output 121.The amplitude A of duplexer output 119 and 121 places signal separately and A ' basically with the amplitude A identical with A ' (as shown in Figure 3A) of the signal that is received.Therefore, the power level (as indicated) that can use greater than tuner in the conventional separators system as the power level that for example can use by area 230 by area 246 each indicated self-tuner.This extra power is converted into higher output signal quality.
Fig. 5 shows diplexer device 500 according to an embodiment of the invention with the circuit schematic form.Diplexer device 500 comprises input node 502.The input node is conductively coupled to first filter segment 504 and second filter segment 506.First filter segment 504 and second filter segment 506 have output node 508 and 510 separately.In illustrated embodiment, first filter segment 504 presents high pass filter characteristic, and second filter segment 506 presents low-pass filter characteristic.Yet as mentioned above, a variety of filter characteristic intentions fall within the scope of the present invention.Discuss in more detail as following, in one embodiment, first filter segment and second filter segment are tunable filter segments.
The assembly of high pass filter section 504 is adapted to be to produce has the filter characteristic of specific lower limiting frequency.In one embodiment of the invention, the assembly of low pass filter part 506 is adapted to be to produce has the filter characteristic of upper cut off frequency, and this upper cut off frequency is substantially equal to the lower limiting frequency of filter segment 504.In other embodiments of the invention, lower limiting frequency and upper cut off frequency are separated from one another.In one embodiment of the invention, the passband of filter section branch generation is overlapping.
Notice that as top in one embodiment, first filter segment and second filter segment are tunable filter segments.Correspondingly, the corner frequency of each filter is adjustable.In example embodiment, this adjusting is subjected to the influence of the control of the tuning voltage that applies at tuning node 518,519,563 and 565 places.As one of ordinary skill in the art will appreciate, varactor device 526 and 536 electric capacity can be respectively regulated by the variation of the tuning voltage that applies at node 518 and 519 places.In a similar manner, varactor device 568 and 572 electric capacity can be respectively regulated by the variation of the tuning voltage that applies at tuning node 563 and 565 places.
It should be noted that in one embodiment of the invention the tuning voltage source 518,519,563 and 565 that identifies above is single tuning voltage sources.In such embodiments, node 518,519,563 and 565 is connected to each other.In other words, tuning voltage source 518,519,563 and 565 can be shared each other, can be in groups or can be independent of each other fully.Can provide these tuning voltage sources by individual equipment or a plurality of equipment.In addition, notice that the tuning voltage source can comprise phase-locked loop (PLL) as top.In another embodiment, the tuning voltage source can comprise digital to analog converter (DAC).In another embodiment, the tuning voltage source can comprise variable resistance.
In operation, duplexer 500 is adapted to be the modulated carrier signal that receives input node 502 places.Upward first frequency band to upper cut off frequency is delivered to output node 510 by low pass filter part 506.According to one embodiment of present invention, this first frequency band comprises at least the first signal channel.Second frequency band higher than above-mentioned lower limiting frequency is delivered to output node 508 by high pass filter section 504.This second frequency band comprises secondary signal channel at least.It will be understood by those skilled in the art that the selection of the concrete components values of disclosed equipment is a design problem according to disclosing of carrying out here.
It will be understood by those skilled in the art that diplexer device 500 only is that a lot of possible duplexers one of are arranged.For example, diplexer device can include one or more in source filter equipment, passive filter equipment and the digital filter equipment.In various embodiments, filter apparatus comprises the filter of being made up of operational amplifier and accessory part.In other embodiment, duplexer according to the present invention comprises one or more digital filters.In various embodiments, utilize discrete assembly to realize digital filter, in other embodiments, use microprocessor and/or digital signal processor (DSP) device to realize digital filter.In other embodiments, adopt the filter that is implemented as integrated circuit.
It will be appreciated by the skilled addressee that in various embodiments duplexer is implemented as the two or more combination in the aforesaid filters equipment.Correspondingly, the present invention includes but be not limited to all aforementioned duplexer implementations.In addition, should understand above-mentioned diplexer device only is a example embodiment in much may embodiment.Correspondingly, as the skilled person will appreciate, in various embodiment of the present invention, will adopt various demultiplexer equipment.
Fig. 6 shows another embodiment of the present invention with the block diagram form.As shown in Figure 6, diplexer device is implemented as integrated circuit 600.Integrated circuit 600 comprises first filter segment 602 and second filter segment 604. Filter segment 602 and 604 has interconnective input node 606 and 608.As directed, filter segment 602 and 604 is included on the public ic substrate.Output node 628 and 630 can be couple to the corresponding input node of another treatment system 636.According to various embodiments of the present invention, this another treatment system can be one of a variety of systems such as the PIP display device.
Alternatively, on ic substrate, comprise the first and second output amplifier equipment.Input amplifier also is integrated on the substrate alternatively.
The integrated circuit 600 that it will be understood by those skilled in the art that Fig. 6 comprises one group of concrete assembly according to an embodiment of the invention.In various embodiments, according to the needs of concrete application, such integrated circuit can easily comprise more or less assembly.For example, in one embodiment, integrated circuit 600 is implemented as and only comprises the single filter part.In another embodiment, on ic substrate, realize a plurality of filter segments, and do not have the input and output amplifier apparatus.In another embodiment of the present invention, integrated device electronics comprises complete tuner system, and this complete tuner system comprises preamplifier, duplexer, tuner apparatus, mpeg decoder equipment and buffer device.Another embodiment of the present invention comprises by the adaptive RF modulating equipment that complete PIP shows signal is modulated to the RF carrier signal.
Fig. 7 illustrates according to another embodiment of the present invention PIP display system 700 with the block diagram form.This PIP display system 700 comprises the input node 706 of diplexer device 708.This input node 706 is adapted to be and receives for example modulated radio signal.This modulated rf signal can receive from for example coaxial cable 703.
In example embodiment, diplexer device comprises first filter segment 710 and second filter segment 712.First filter segment and second filter segment have output node 714 and 716 separately, and output node 714 and 716 is coupled to the corresponding input node 718 and 720 of tuner system 722. Input node 718 and 720 is couple to first tuner apparatus 728 and second tuner apparatus 730 input 733 and 735 separately.
In example embodiment, tuner apparatus 728 and 730 also has control input end 732 and 734 separately.These inputs 732 and 734 are coupled to receive control signal from the control appliance 736 such as microprocessor or microcontroller device.
In one embodiment of the invention, controller equiment 736 is come to receive control signal by remote control equipment 738 from the user by adaptive.In one embodiment, the communication between remote control equipment 738 and the control appliance 736 realizes on the wireless communication link 740 such as the combination of radio frequency communication link, optical frequency communication link, ultrasound communication link and/or above-mentioned link.
Fig. 8 shows personal video recorder according to an embodiment of the invention (PVR) system 800.The input node 801 of PVR system 800 is couple to for example 804 and 806 separately inputs of two or more filter apparatus simultaneously.Filter apparatus 804 and 806 is couple to corresponding tuner apparatus 812 and 814 at its output separately then.Alternatively, corresponding buffer amplifier can be coupled between filter apparatus and the tuner apparatus.Tuner apparatus 812 and 814 is couple to the respective decoder equipment 816 and 818 such as mpeg decoder equipment, MPEG II decoder apparatus or other decoder apparatus then.
It will be understood by those skilled in the art that this another treatment facility 828 can comprise other decoder apparatus, such as mpeg decoder equipment.In another embodiment, omit decoder apparatus 816 and 818, the data behind the coding directly store memory device 822 and 814 into.Go out as shown, the output of this another treatment facility 828 is couple to the output 832 of PVR 800 by another buffer amplifier 830.This output 832 is adapted to be and is couple to conventional television apparatus for example as known in the art.
As can from the embodiments described herein, seeing, present invention includes a kind of signal allocation that to be received of being used for to method and apparatus such as a plurality of signal handling equipments of tuner.
Should notice once more that although specifically described the present invention with reference to the video reception equipment that comprises PIP video reception equipment, the present invention has wider applicability, and can in a variety of video reception equipments and method, use.Top description and accompanying drawing have been set forth the preferred embodiment of realizing purpose of the present invention, feature and advantage.Be not intended to make the present invention to be confined to the embodiment that is set forth.The of the present invention any modification that drops within the spirit and scope of claims all should be thought of as part of the present invention.
Claims (20)
1. processing system for video comprises:
Diplexer device (708) has first signal output part (714) and secondary signal output (716);
First tuner (728) has the first tuner input (733) that is couple to described first output (714);
Second tuner (730) has the second tuner input (735) that is couple to described secondary signal output (716); And
Video signal preprocessor (750), be used to generate the signal of a plurality of images of expression, have corresponding first output (742) that is couple to described first tuner apparatus (728) and described second tuner apparatus (730) and the first input end (746) and second input (748) of second output (744).
2. processing system for video as claimed in claim 1, wherein, described diplexer device (708) comprises first filter segment (710) and second filter segment (712).
3. processing system for video as claimed in claim 2, wherein, at least one in described first filter segment (710) and described second filter segment (712) is tunable.
4. processing system for video as claimed in claim 2, wherein, described first filter segment (710) comprises low pass filter part (506), described second filter segment (712) comprises high pass filter section (504).
5. processing system for video as claimed in claim 1, wherein, described first tuner (728) and second tuner (730) comprise corresponding first control input end (732) and second control input end (734), and described first control input end (732) and second control input end (734) are couple to controller equiment (736) jointly.
6. processing system for video as claimed in claim 1, wherein, described PIP image forming apparatus (750) comprises mpeg decoder equipment (751).
7. processing system for video as claimed in claim 1, wherein, described diplexer device (708) comprises integrated device electronics (600).
8. processing system for video as claimed in claim 7, wherein, described integrated device electronics (600) comprises integrated amplifier equipment.
9. processing system for video as claimed in claim 1 also comprises at least one data storage device (822).
10. processing system for video as claimed in claim 9, wherein, described at least one data storage device (822) comprises hard disk storage devices.
11. processing system for video as claimed in claim 9, wherein, described at least one data storage device (822) comprises flash memory.
12. processing system for video as claimed in claim 1, wherein, described duplexer (708) is adapted to be and receives first modulated carrier signal and produce first signal section (238) and secondary signal part (240), described first signal section (238) comprises first channel (250), described secondary signal part (240) comprises second channel (252), described first signal section (238) does not comprise described second channel (252) basically, and described secondary signal part (240) does not comprise described first channel (250) basically.
13. a method that generates vision signal comprises:
The multiplexing modulated carrier signal that receives (224), so that produce first signal section (238) and secondary signal part (240), described first signal section (238) comprises the first video frequency program channel (250) and does not comprise the second video frequency program channel (252) basically, and do not comprise described first channel (250) basically;
Tuning described first channel (250) from described first signal section (238);
Tuning described second channel (252) from described secondary signal part (240); And
Respective input (746,748) in image forming apparatus (750) locates to receive described first channel (250) and described second channel (252).
14. the method for generation vision signal as claimed in claim 13 also is included in decoding described first channel (250) and described second channel (252) in the mpeg decoder equipment (751).
15. the method for generation vision signal as claimed in claim 13 also is included in display screen (756) and goes up the described image of demonstration.
16. the method for generation vision signal as claimed in claim 15, wherein, described display screen (756) comprises first main image region (758) and the 2nd PIP image-region (760).
17. the method for generation vision signal as claimed in claim 13, wherein, the described multiplexing described modulated carrier signal that receives (224) signal input part (118) that is included in the filter segment (114) of diplexer device (112) locates to receive described modulated carrier signal (224).
18. the method for generation vision signal as claimed in claim 13 also is included in ground-plane antenna (104) and locates to receive described modulated carrier signal (224).
19. the method for generation vision signal as claimed in claim 13 also is included in coaxial cable (703) and locates to receive described modulated carrier signal (224).
20. a device comprises:
Be used to receive the parts of the modulated rf signal (224) that comprises first television channel (220) that is in first power level separately and second television channel (222);
Be used for modulated rf signal (224) is separated into the parts of at least two frequency bands (238,240), each in described at least two frequency bands (238,240) comprises described first television channel (220) that is in described first power level separately basically and at least one in second television channel (222);
Be used for from the parts of described at least two frequency bands (238,240) tuning described first television channels (220) and second television channel (222); And
Be used for parts in response to described first television channel (220) and second television channel (222) display video image.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US2005/046231 WO2006083419A2 (en) | 2005-01-28 | 2005-12-21 | Delay restricted channel estimation for multi-carrier systems |
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| Publication Number | Publication Date |
|---|---|
| CN101548538A true CN101548538A (en) | 2009-09-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006800565265A Pending CN101548538A (en) | 2005-12-21 | 2006-12-04 | Tuning device with diplexer input |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104471856A (en) * | 2012-06-18 | 2015-03-25 | 汤姆逊许可公司 | Apparatus and method for inserting electrical power or control signals into a diplexer circuit |
| CN106257927A (en) * | 2015-06-24 | 2016-12-28 | 上海未来宽带技术股份有限公司 | Tuner |
-
2006
- 2006-12-04 CN CNA2006800565265A patent/CN101548538A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104471856A (en) * | 2012-06-18 | 2015-03-25 | 汤姆逊许可公司 | Apparatus and method for inserting electrical power or control signals into a diplexer circuit |
| US9479818B2 (en) | 2012-06-18 | 2016-10-25 | Thomson Licensing | Apparatus and method for inserting electrical power or control signals into a diplexer circuit |
| CN106257927A (en) * | 2015-06-24 | 2016-12-28 | 上海未来宽带技术股份有限公司 | Tuner |
| CN106257927B (en) * | 2015-06-24 | 2019-11-08 | 上海未来宽带技术股份有限公司 | Tuner |
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Application publication date: 20090930 |