CN100405832C - TV set apparatus capable of simultaneously receiving and playing multi-channel programs - Google Patents

Abstract

The present invention relates to a TV apparatus capable of simultaneously receiving and playing multi-channel programs, which is provided with a plurality of digital radio-frequency heads, a multi-way digital audio and video decoding circuit, a multi-way audio and video signal processing and output circuit and a multi-way audio output switching control circuit, wherein the digital radio frequency heads are connected in parallel to the multi-way digital audio and video decoding circuit which is connected with the multi-way audio and video signal processing and output circuit and the multi-way audio output switching control circuit. Simultaneously, the multi-way audio and video signal processing and output circuit is also connected with a display screen and outputs multi-way video signals to the display screen, and at least more than two sets of video signals are simultaneously displayed on a display screen of a high-visibility digital TV with a large screen. Sound signals are output to a horn or a wired/wireless earphone through the multi-way audio output switching control circuit. More than two users can enjoy different television programs on one TV at the same time by using the TV device of the present invention, and moreover, the video signals and the sound signals do not affect each other, so the present invention has the advantages of providing convenience for domestic use and satisfying different requirements for multiple users.

Description

A kind of realization can receive the TV set device of playing multiple programs simultaneously

Technical field

The present invention relates to the receiving and processing device of television set, more particularly, it is a kind of devices that utilize television set to receive many cover TV programme signal and show many cover TV programme images simultaneously on same display screen, and this device can utilize the loud speaker of this television set and earphone to receive simultaneously and play many cover TV programme.

Background technology

At present a lot of simulated televisions have picture-in-picture function, the user can monitor another set of program by picture when watching a certain programs, two pictures of picture-in-picture are divided into key frame and from picture, have only key frame that sound accompaniment output is arranged, and do not have sound accompaniment output from picture, therefore can not watch different TV programme simultaneously for plural people.Same, also there is same shortcoming in the digital television of band picture out picture function.

Along with the development of large-screen high-resolution degree Display Technique, make on same TV to show that with better quality a few cover TV programme become possibility.As one 61 inches DLP rear-projection TV, but but its display area four/big once the display area of television set than existing 29 inches, resolution be height than the latter also.If therefore relatively according to existing 29 inches television screen, on 61 inches DLP rear-projection TV, show 4 cover TV programme simultaneously, the display effect of every suit all is better than the display effect of existing 29 inches television sets.Though, be a kind of waste on resource so in the application of reality, watch a channel to have good appreciation effect with a television set merely; And the situation of foundation family's use at present television set, everyone all has the different demands of viewing and admiring basically one family, and television set just requires to meet different taste human needs and service condition, and existing television set does not possess.

On the other hand, the development of digital television techniques and integrated circuit technique realizes the parallel processing of multichannel TS stream on single-chip, overlap digital TV signal parallel decoding more, and the multichannel audio-video frequency signal parallel is handled and output becomes possibility.Use and economic angle consideration from family, need satisfy a plurality of consumers' the requirement of viewing and admiring at one time, also need the device that to play a plurality of television programs simultaneously, can satisfy above-mentioned needs simultaneously with a television set.

Summary of the invention

The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of and can receive the TV set device of playing multiple programs simultaneously in the realization of watching the TV programme more than two covers on the television set simultaneously, this device can receive sound and the image of playing the above TV programme of two covers simultaneously, and does not disturb mutually.

Another object of the present invention provides a kind of the realization can receive the TV set device of playing multiple programs simultaneously, and this device is reception, the broadcast of compatible a plurality of channels simultaneously, watches conveniently, do not disturb mutually between each program, and cost of manufacture is cheap.

Thinking of the present invention is to utilize the characteristics that generally comprise many cover TV programme in the digital TV TS stream, utilizes picture-in-picture function to watch simultaneously under the situation of having only a digital tuner and listens to many cover TV programme.Utilize two digital tuners just to can be implemented on this basis and select two programs to watch simultaneously in all programs arbitrarily.Add sound accompaniment processing method of the present invention and circuit, can realize really that a television set has the playing function and the effect of multiple TV set.

The present invention realizes according to following mode:

A kind of realization can receive the TV set device of playing multiple programs simultaneously, it is provided with a plurality of digital tuners, multi-path digital audio/video decoding circuit, multichannel audio-video frequency signal processing and output circuit, multichannel voice frequency output control switching circuit, above-mentioned a plurality of digital tuner is parallel to multi-path digital audio/video decoding circuit, multi-path digital audio/video decoding circuit is connected with multichannel audio-video frequency signal processing and output circuit in turn, multichannel voice frequency output control switching circuit, simultaneously, multichannel audio-video frequency signal processing and output circuit also connect display screen, to display screen output multi-channel video signal, allow the above vision signal of at least two covers show on a large-screen high-resolution digital television display screen simultaneously, corresponding audio signal then outputs on loudspeaker or the wire/wireless earphone via multichannel voice frequency output control switching circuit.Use has the television set of apparatus of the present invention, can allow plural user appreciate different TV programme simultaneously on same television set, and vision signal and formation influence mutually of audio signal, makes things convenient for the use of family and multi-user's different demands.

Described realization can receive the TV set device of playing multiple programs simultaneously, and its multichannel voice frequency output control switching circuit is the controllable electronic switch integrated circuit.One group on per two switches wherein, two input connect in parallel in the group, one tunnel decoded digital audio and video signals are added to input in parallel simultaneously; The output of a switch of this group is attached to a way weighted-voltage D/A converter DAC again with the output parallel connection of a switch of another group, by DAC digital audio and video signals is converted to simulated audio signal; The control end of each switch is independently, accepts the control of the control signal that host CPU sends respectively, and input signal is connect output to user's appointment.

Above-mentioned electronic switch integrated circuit is common, and what adopt is the two-way digital switch, audio signal is simultaneously by these two digital switchs, and promptly two cover I2S audio signal I2S1 and the I2S2 by audio decoding circuit output is attached to digital switch 1 and digital switch 2 respectively.Digital switch 1 and digital switch 2 respectively have 8 switches, are divided into two groups.Two groups of parallel connections of input, output is received the first via audio frequency DAC circuit and the second road audio frequency DAC circuit respectively for two groups.The control end of every group of switch is independently, accepts the control of the control signal that host CPU sends respectively, and input signal is connect output to user's appointment, carries out audio frequency DAC conversion and controllably outputs to loudspeaker or earphone then.

Described realization can receive the TV set device of playing multiple programs simultaneously, the microprocessor (CPU) of its multi-path digital audio/video decoding circuit and multichannel audio-video frequency signal processing and output circuit and television set can be integrated in together, form unified signal processing module, make things convenient for the setting of circuit.

And described realization can receive the TV set device of playing multiple programs simultaneously, because television set itself carries audio amplifier and loudspeaker, it is identical or reduce one the tunnel that the quantity that its wired or wireless earphone is equipped with and multichannel voice frequency are exported the output way of control switching circuit.

The method that to the effect that on a large-screen high-resolution digital television, receives many cover TV programme simultaneously of the present invention.And core content is a multi-channel television audio signal output switching handling method.This method guarantees any one tunnel audio signal can be outputed on any loudspeaker or the wire/wireless earphone.Sound accompaniment output is selected to be realized by remote controller and OSD menu by the user with control.

In use, can difference according to circumstances divide general mode and multi-user mode with television set.It is exactly a general television set under the general mode, does not open a plurality of tuners and multichannel audio-video frequency signal decoding circuit, has only a tuner to carry out work, but sound accompaniment can be switched on the earphone.The next startup of multi-user mode device of the present invention can be watched different TV programme simultaneously for many people.Under multi-user mode, video shows based on POP, also can be PIP, is determined by the user.

The present invention compared with prior art has following beneficial effect:

The present invention is arranged in parallel a plurality of tuners in original television set, and by distinctive treatment circuit, with audio frequency, vision signal separate processes and output, can receive from a plurality of interfaces and audio frequency output channel, make the user can under same television display screen, watch a plurality of different television channels simultaneously, and can not form influence mutually between the Voice ﹠ Video of these channels.

And cost of manufacture of the present invention is cheap, is convenient to large-screen receiver setting, is particularly suitable for family and uses.

Description of drawings

Fig. 1 is the digital television schematic diagram that can use when multiple TV set simultaneously,

Fig. 2 (A), (B), (C), (D) are that screen is cut apart schematic diagram when receiving many cover TV programme at the same time,

Schematic diagram was switched in sound accompaniment output when Fig. 3 was two cover TV programme,

Fig. 4 is the television set example that can watch two cover TV programme simultaneously.

Embodiment

For the ease of narration, be that example is illustrated with the television set that can receive 2 cover TV programme simultaneously below.Fig. 1 is the television set schematic diagram that can receive 2 cover TV programme simultaneously.The digital tuner (digital tuner 1 and digital tuner 2) that comprises digital solution modulation part by two covers, demultiplexing, the multichannel audio-video frequency decoding, multichannel audio-video frequency is handled, master cpu, audio frequency output control switching circuit, loudspeaker or wire/wireless earphone large-screen sharpness screen are formed.

By transport stream (TS stream) data of digital tuner through rectification output, be sent to transport stream processor and carry out demultiplexing, sent to by the selected signal data of demultiplexing and to be carried out sound, video decode respectively, the video data that decoding is come out through line by line/calibration (Deinterlace/Scaler) handles, digital video or picture signal stack with other forms composite video signal then, at last composite video signal outputed to display module and finishes the image demonstration.This series of processes all is the mature technology of Digital Television.The digital audio and video signals that decoding is come out then will be through the distinctive audio frequency output of this programme control switching circuit (as shown in Figure 3), deliver to corresponding audio frequency DAC and power amplifier according to user instruction, at last voice output is broadcasted sound accompaniment to loudspeaker or wire/wireless earphone.

Several situations such as Fig. 2 that television screen is cut apart describe, the schematic diagram that Fig. 2 (A), (B), (C), (D) have described respectively that 16: 9 TV programme screens of two covers are cut apart, 4: 3 TV programme screens of two covers are cut apart, 4: 3 TV programme screens of 16: 9 TV programme of a cover and a cover are cut apart, the quadruplet video screen is cut apart.

Fig. 3 is that schematic diagram is switched in sound accompaniment output when overlapping TV programme at two, shown in the figure, two audio signal program one sound accompaniment (I2S1) and program two sound accompaniments (I2S2) of overlapping TV programme of being exported by audio decoding circuit are attached to digital switch 1 and digital switch 2 respectively.Digital switch 1 and digital switch 2 respectively have 8 switches, are divided into two groups.Two groups of parallel connections of their input, output is received the first via audio frequency DAC circuit and the second road audio frequency DAC circuit respectively for two groups.The control end of every group of switch is independently, accepts the control of the control signal that host CPU sends respectively, and input audio signal is connect output to user's appointment, carries out audio frequency DAC conversion and controllably outputs to loudspeaker or earphone then.Host CPU is received the output that comes the control audio signal by following control logic table after the remote control command.The control logic table of its switching is as follows:

Audio signal switch control logic table

This circuit can be delivered to arbitrary road DAC circuit with arbitrary cover in the two cover TV programme audio signals.

Again as seen from Figure 4, these the concrete integrated DVB-C numeral of two CU1216 PHILIPS of employing tuners of implementing, an ATI Xilleon X226 digital TV in high resolution chip connects 61 " the DLP rear projection display, be furnished with two cover voicefrequency circuits.Xilleon X226 has powerful decoding capability, can separate two-way HDTV (High-Definition Television) signal or the clear TV signal of 8 road signs simultaneously.Send DLP to show after treatment through one or more vision signal of Xilleon X226 decoding.And export by two I2S mouths through one or more audio signal of Xilleon X226 decoding, through the audio frequency output control circuit, arbitrary road audio signal is delivered to the voicefrequency circuit output of appointment.The audio frequency output control circuit is mainly finished jointly by two PI3C3224 and host CPU.Its working method front is existing to be described, and repeats no more here.In the ordinary course of things, this multiuser television set is under the general mode, with general television set and indifference.Under multi-user mode, by display mode and the audio frequency way of output of user by the many covers of remote controller control video frequency program.

In concrete enforcement, adopted the screen partitioning scheme shown in Fig. 2 (A), Fig. 2 (B) and Fig. 2 (C).The concrete selection determined by programme signal and user.The area of video 1 and video 2 is greater than 29 among the figure " television set viewable portion area.Effect is fine when watching two programs.Make full use of the technological merit of Digital Television, 4 showing electronic program guide (EPG) information etc. between 3/ screen area between screen area.When video frequency program band caption information, 4 showing caption informations between 3/ screen area between screen area.The audio frequency output facet, it is stereo that two programs are all exported the left and right sides.One route loud speaker or earphone output, another route Infrared wireless earphone output.Generally loud speaker does not have obvious interference to using the earphone person.To special sensitive users, can all adopt earphone output.

Say in principle, as long as the enough big resolution of display screen enough high (as 61 " DLP); can allow a television set receive simultaneously and overlap TV programme more; and that next television set of most applications uses simultaneously for 2 people is just much of that; watch the football game as husband on a television set; wife sees serial, do not disturb mutually.Also can realize the switching controls of audio frequency output simultaneously, the sound of one programs is exported by speaker/earpiece, and the sound of other programs is exported by earphone, can switch by remote controller each other, certainly preferably all by earphone output, the interference of audio frequency does not just exist like this.

Claims (5)

1. a realization can receive the TV set device of playing multiple programs simultaneously, it is characterized in that it is provided with a plurality of digital tuners, multi-path digital audio/video decoding circuit, multichannel audio-video frequency signal processing and output circuit, multichannel voice frequency output control switching circuit, above-mentioned a plurality of digital tuner is parallel to multi-path digital audio/video decoding circuit, multi-path digital audio/video decoding circuit is connected with multichannel audio-video frequency signal processing and output circuit in turn, multichannel voice frequency output control switching circuit, simultaneously, multichannel audio-video frequency signal processing and output circuit also connect display screen, to display screen output multi-channel video signal, allow the above vision signal of at least two covers show on a large-screen high-resolution digital television display screen simultaneously, corresponding audio signal then outputs on loudspeaker or the wire/wireless earphone via multichannel voice frequency output control switching circuit.

2. realization as claimed in claim 1 can receive the TV set device of playing multiple programs simultaneously, it is characterized in that its multichannel voice frequency output control switching circuit is the controllable electronic switch integrated circuit, one group on per two switches wherein, two input connect in parallel in the group, one tunnel decoded digital audio and video signals are added to input in parallel simultaneously; The output of a switch of this group is attached to a way weighted-voltage D/A converter DAC again with the output parallel connection of a switch of another group, by DAC digital audio and video signals is converted to simulated audio signal; The control end of each switch is independently, accepts the control of the control signal that host CPU sends respectively, and input signal is connect output to user's appointment.

3. realization as claimed in claim 2 can receive the TV set device of playing multiple programs simultaneously, it is characterized in that common what adopt is the two-way digital switch to above-mentioned electronic switch integrated circuit, audio signal is simultaneously by these two digital switchs, promptly two cover I2S audio signal I2S1 and the I2S2 by audio decoding circuit output is attached to digital switch 1 and digital switch 2 respectively, digital switch 1 and digital switch 2 respectively have 8 switches, be divided into two groups, two groups of parallel connections of input, output is received the first via audio frequency DAC circuit and the second road audio frequency DAC circuit respectively for two groups, the control end of every group of switch is independently, accept the control of the control signal that host CPU sends respectively, input signal is connect output to user's appointment, carry out audio frequency DAC conversion and controllably output to loudspeaker or earphone then.

4. realization as claimed in claim 1 can receive the TV set device of playing multiple programs simultaneously, the microprocessor (CPU) that it is characterized in that its multi-path digital audio/video decoding circuit and multichannel audio-video frequency signal processing and output circuit and television set can be integrated in together, forms unified signal processing module.

5. realization as claimed in claim 1 can receive the TV set device of playing multiple programs simultaneously, and it is identical or reduce one the tunnel to it is characterized in that quantity that its wired or wireless earphone is equipped with and multichannel voice frequency are exported the output way of control switching circuit.

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