CN210629669U - Intelligent digital television - Google Patents
Intelligent digital television Download PDFInfo
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- CN210629669U CN210629669U CN201921469086.7U CN201921469086U CN210629669U CN 210629669 U CN210629669 U CN 210629669U CN 201921469086 U CN201921469086 U CN 201921469086U CN 210629669 U CN210629669 U CN 210629669U
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Abstract
The utility model discloses an intelligent digital television, which comprises a tuner chip, a channel demodulation chip, a master control CPU, a video decoder, an audio decoder, a display screen and a loudspeaker; the intelligent digital television is provided with a high-frequency signal input port, the high-frequency signal input port is connected with a tuner chip, and the tuner chip is connected with a channel demodulation chip; the main control CPU is respectively connected with the tuner chip, the channel demodulation chip, the video decoder and the audio decoder; the first output end of the video decoder is connected with the display screen through the CCIR601 video encoder, and the second output end of the video decoder is connected with the display screen through the D/A video converter; the audio decoder is connected with the loudspeaker through the D/A audio converter. In the embodiment of the utility model, intelligent digital television need not external cable digital television receiver (STB) and can watches TV program, makes the process of watching TV program more convenient, has improved user's result of use.
Description
Technical Field
The utility model relates to a television equipment technical field particularly, relates to an intelligent digital television.
Background
With the development of science and technology, intelligent household appliances have gradually come into the lives of people, and the application of the intelligent television is more and more extensive.
In the existing part of intelligent televisions, because high-frequency signals which are transmitted by a ground broadcasting system and conform to DTMB or DVB-C standards cannot be demodulated, an external cable digital television receiver (set top box) is needed to watch television programs, great inconvenience is brought to users, and the using effect of the users is influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, the utility model provides an intelligence digital television, intelligence digital television can demodulate the high frequency signal that accords with DTMB or DVB-C standard, need not external cable digital television receiver (STB) and can watch TV program, and it is more convenient to make the process of watching TV program, has improved user's result of use.
Correspondingly, the embodiment of the utility model provides an intelligence digital television, intelligence digital television includes tuner chip, channel demodulation chip, main control CPU, video decoder, audio decoder, display screen and speaker, wherein:
the intelligent digital television is provided with a high-frequency signal input port, the high-frequency signal input port is connected with the tuner chip, and the tuner chip is connected with the channel demodulation chip;
the main control CPU is respectively connected with the tuner chip, the channel demodulation chip, the video decoder and the audio decoder;
a first output end of the video decoder is connected with the display screen through a CCIR601 video encoder, and a second output end of the video decoder is connected with the display screen through a D/A video converter;
the audio decoder is connected with the loudspeaker through a D/A audio converter.
In an alternative embodiment, the tuner chip is model number TUA 6039.
In an optional embodiment, the model of the channel demodulation chip is AVL 6543.
In an optional embodiment, the main control CPU is externally connected with a FLASH ROM.
In an optional implementation manner, the main control CPU is connected to the tuner chip and the channel demodulation chip through an I2C bus, respectively.
In an optional embodiment, the model of the master CPU is MSD6a928
In an alternative embodiment, the video decoder is externally connected with an SDRAM.
In an alternative embodiment, the CCIR601 video encoder is of the type GN-1824.
In an optional implementation manner, the model of the D/a video converter is TMC 3033.
In an optional embodiment, the D/a audio converter is model MXT 8211.
The embodiment of the utility model provides an intelligent digital television, intelligent digital television can carry out tuning processing to the high frequency signal of ground broadcast transmission through the tuner chip, changes the high frequency signal into intermediate frequency signal; converting the intermediate frequency signal into a TS transmission stream digital signal through the channel demodulation chip; analyzing the TS transmission stream digital signal through the main control CPU, and separating to obtain a video ES stream and an audio ES stream; decoding the video ES stream in real time through the video decoder, displaying 8-bit high-definition video signals in real time based on the video encoder and the display screen, and displaying 24-bit high-definition video signals in real time based on the D/A video converter and the display screen; and decoding the audio ES stream in real time through the audio decoder, and playing audio signals in real time based on the D/A audio converter and the loudspeaker so as to watch television programs in the intelligent digital television. Therefore, the intelligent digital television can demodulate the high-frequency signals conforming to the DTMB or DVB-C standard, and can watch television programs without an external cable digital television receiver (set top box), so that the process of watching the television programs is more convenient, and the using effect of users is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of the components of the intelligent digital television according to the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Fig. 1 is a schematic diagram of the components of the intelligent digital television according to the embodiment of the present invention.
The embodiment of the utility model provides an intelligence digital television, intelligence digital television includes tuner chip 1, channel demodulation chip 2, master control CPU3, video decoder 4, audio decoder 5, display screen 6 and speaker 7.
It should be noted that a Central Processing Unit (CPU) is one of the main devices of an electronic computer, and the functions of the CPU are mainly to interpret computer instructions and process data in computer software. The CPU is the core part in computer for reading, decoding and executing instructions, and includes two parts, controller and arithmetic unit, as well as cache memory and data and control bus for realizing the connection between them. The central processing unit mainly has the functions of processing instructions, executing operations, controlling time, processing data and the like.
Specifically, the tuner chip 1 includes a high-frequency signal input terminal 11, an AGC signal input terminal 12, an intermediate-frequency signal output terminal 13, and a first control signal input terminal 14.
The intelligent digital television is provided with a high-frequency signal input port 8, the high-frequency signal input port 8 is connected with a high-frequency signal input end 11, and high-frequency signals received by the intelligent digital television are transmitted to the tuner chip 1 through the high-frequency signal input port 8.
In the embodiment of the present invention, the tuner chip 1 is used to tune the high-frequency signal, so as to convert the high-frequency signal into an intermediate-frequency signal.
It should be noted that the tuner chip 1 may be of various kinds as long as equivalent functions and effects are achieved. In the embodiment of the utility model provides an in, the model of tuner chip 1 is TUA6039, and the tuner chip 1's of TUA6039 type consumption is only 330mW, has the advantage of low-power consumption, and tuner chip 1 of TUA6039 type supports all main simulation and digital standard on ground wireless television and the cable TV moreover, has fine commonality.
Specifically, the channel demodulation chip 2 includes an intermediate frequency signal input terminal 21, an AGC signal output terminal 22, a TS stream output terminal 23, and a second control signal input terminal 24.
The intermediate frequency signal output end 13 of the tuner chip 1 is connected to the intermediate frequency signal input end 21, and the tuner chip 1 transmits the intermediate frequency signal to the channel demodulation chip 2.
The embodiment of the present invention provides an embodiment, through channel demodulation chip 2 is right after the intermediate frequency signal is processed such as a/D conversion, QAM demodulation, front and back error correction, decoding filtering, the intermediate frequency signal is converted into TS transport stream digital signal.
The AGC signal output 22 is connected to the AGC signal input 12 of the tuner chip 1, and the channel demodulation chip 2 transmits an AGC signal to the tuner chip 1.
The embodiment of the utility model provides an in, channel demodulation chip 2 can carry out the AD sampling to the intermediate frequency signal received, and according to the corresponding AGC signal of intermediate frequency signal transmission arrives in tuner chip 1, contain the intermediate frequency signal gain in the AGC signal, tuner chip 1 is based on the intermediate frequency signal of intermediate frequency signal gain adjustment output to the realization is adjusted the feedback to intermediate frequency signal.
It should be noted that the kind of the channel demodulation chip 2 may be various, as long as the equivalent function and effect can be achieved. In the embodiment of the utility model, the model of channel demodulation chip 2 is AVL6543, and the channel demodulation chip 2 of AVL6543 type is the single channel, supports the DTMB standard that china has the autonomic intellectual property right and the DVB-C standard in Europe, and the channel demodulation chip 2 of AVL6543 type can switch between DTMB and DVB-C mode fast, supports multiple tuner chip 1 simultaneously, has fine commonality.
Specifically, the main control CPU3 includes a TS stream input terminal 31, an ES stream first output terminal 32, an ES stream second output terminal 33, and a control signal output terminal 34.
The TS stream output terminal 23 of the channel demodulation chip 2 is connected to the TS stream input terminal 31 of the main control CPU3, and the channel demodulation chip 2 transmits the acquired TS transport stream digital signal to the main control CPU 3.
In the embodiment of the present invention, the main control CPU3 parses the TS transport stream digital signal, extracts the relevant PSI table, and separates the video ES stream and the audio ES stream by using the built-in PID filter, thereby realizing the demultiplexing of the TS transport stream digital signal.
In the embodiment of the present invention, the control signal output terminal 34 of the main control CPU3 is connected to the first control signal input terminal 14 of the tuner chip 1 and the second control signal input terminal 24 of the channel demodulation chip 2 through the I2C bus, respectively, through the main control CPU3 controlling the tuner chip 1 and the operation of the channel demodulation chip 2.
In addition, the main control CPU3 is externally connected with a FLASH ROM35, in the embodiment of the present invention, the source program of the intelligent digital television is loaded in the FLASH ROM35, and after the intelligent digital television is powered on, the main control CPU3 loads and runs the source program from the FLASH ROM35 to control the running process of the intelligent digital television.
It should be noted that the main control CPU3 may be of various types as long as it can achieve equivalent functions and effects. In the embodiment of the present invention, the model of the main control CPU3 is MSD6a928, and the main control CPU3 of the MSD6a928 adopts a quad-core ARM Cortex-a17 design, so as to smoothly operate the above process, and have the advantages of high operating efficiency and low power consumption.
The ES stream first output 32 of the master CPU3 is connected to the video decoder 4 and transmits the video ES stream to the video decoder 4.
In the embodiment of the present invention, the video decoder 4 can decode the video ES stream conforming to the MPEG-2 compression standard in real time, and the video decoder 4 can output both the standard definition video signal of 8-bit and the high definition video signal of 24-bit.
In addition, the video decoder 4 is externally connected with a 128Mbits SDRAM40, and the SDRAM40 is used for data storage during the decoding process of the video decoder 4.
Wherein the first output terminal 411 of the video decoder 4 is connected to the display screen 6 through the CCIR601 video encoder 42, the 8-bit standard definition video signal is transmitted to the CCIR601 video encoder 42 through the first output terminal 411, the 8-bit standard definition video signal is re-encoded by the video encoder 42, so that the 8-bit standard definition video signal conforms to the CCIR601 standard, and the standard definition video signal conforming to the CCIR601 standard is transmitted to the display screen 6 for displaying.
It should be noted that the CCIR601 video encoder 42 may be of various kinds as long as the equivalent effect can be achieved. In the embodiment of the present invention, the model of the CCIR601 video encoder is GN-1824, and the CCIR601 video encoder of GN-1824 conforms to the MPEG-2 standard, and supports the video ES stream conforming to the MPEG-2 compression standard, which satisfies the requirements of the embodiment of the present invention.
The second output end 412 of the video decoder 4 is connected to the display screen 6 through the D/a video converter 43, the 24-bit high-definition video signal is transmitted to the D/a video converter 43 through the second output end 412, the D/a video converter 43 performs digital-to-analog conversion on the 24-bit high-definition video signal, and the high-definition video signal is converted into a high-definition video analog signal for displaying on the display screen 6.
Note that the D/a video converter 43 may be of various kinds as long as equivalent effects can be achieved. In the embodiment of the present invention, the model of the D/a video converter 43 is TMC3033, the D/a video converter 43 of TMC3033 is a high-speed three-video 10-bit D/a converter, and is particularly suitable for video and image applications, the D/a video converter 43 of MC3033 provides 10-bit resolution and TTL compatible input, and only needs one +3.3V power supply to drive, which has the advantage of low power consumption.
In the embodiment of the present invention, the audio decoder 5 may decode audio conforming to the MPEG-2 compression standard to obtain an audio signal.
The audio decoder 5 is connected to the speaker 7 through a D/a audio converter 51, and the audio decoder 5 transmits an audio signal to the D/a audio converter 51 for digital-to-analog conversion, so as to convert the audio signal into an audio analog signal for playing in the speaker 7.
It should be noted that the D/a audio converter 51 may be of various types as long as equivalent effects can be achieved. In the embodiment of the present invention, the model of the D/a audio converter 51 is MXT8211, the D/a audio converter 51 of the MXT8211 type adopts a standard CMOS process, the internal conversion structure is based on an R-2R resistor network, the internal circuit is well matched, and the full range of your can be used to achieve a good 16-bit dynamic precision, and has the advantages of low power consumption, no phase difference in output, and low distortion.
The embodiment of the utility model provides an intelligent digital television, intelligent digital television can carry out tuning processing to the high frequency signal of ground broadcasting system transmission through tuner chip 1, changes the high frequency signal into intermediate frequency signal; converting the intermediate frequency signal into a TS transmission stream digital signal through the channel demodulation chip 2; analyzing the TS transmission stream digital signal through the main control CPU3, and separating to obtain a video ES stream and an audio ES stream; decoding the video ES stream in real time by the video decoder 4, displaying 8-bit high definition video signals in real time based on the video encoder 42 and the display screen 6, and displaying 24-bit high definition video signals in real time based on the D/a video converter 43 and the display screen 6; and decoding the audio ES stream in real time through the audio decoder 5, and playing audio signals in real time based on the D/A audio converter 51 and the loudspeaker 7 so as to watch television programs in the intelligent digital television. Therefore, the intelligent digital television can demodulate the high-frequency signals conforming to the DTMB or DVB-C standard, and can watch television programs without an external cable digital television receiver (set top box), so that the process of watching the television programs is more convenient, and the using effect of users is improved.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable storage medium, and the storage medium may include: a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic or optical disk, or the like.
In addition, the above detailed description is made on an intelligent digital television provided by the embodiment of the present invention, and a specific example should be adopted herein to explain the principle and the implementation manner of the present invention, and the description of the above embodiment is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Claims (10)
1. The intelligent digital television is characterized by comprising a tuner chip, a channel demodulation chip, a main control CPU, a video decoder, an audio decoder, a display screen and a loudspeaker, wherein:
the intelligent digital television is provided with a high-frequency signal input port, the high-frequency signal input port is connected with the tuner chip, and the tuner chip is connected with the channel demodulation chip;
the main control CPU is respectively connected with the tuner chip, the channel demodulation chip, the video decoder and the audio decoder;
a first output end of the video decoder is connected with the display screen through a CCIR601 video encoder, and a second output end of the video decoder is connected with the display screen through a D/A video converter;
the audio decoder is connected with the loudspeaker through a D/A audio converter.
2. The intelligent digital television of claim 1, wherein the tuner chip is model number TUA 6039.
3. The intelligent digital television set according to claim 1, wherein the model of the channel demodulation chip is AVL 6543.
4. The intelligent digital television set according to claim 1, wherein the main control CPU is externally connected with a FLASH ROM.
5. The intelligent digital television set according to claim 1, wherein the master CPU is connected to the tuner chip and the channel demodulation chip respectively through an I2C bus.
6. The intelligent digital television of claim 1, wherein the master CPU is of model MSD6a 928.
7. The intelligent digital television of claim 1, wherein the video decoder is externally connected with SDRAM.
8. The intelligent digital television of claim 1, wherein the CCIR601 video encoder is of the type GN-1824.
9. The intelligent digital television of claim 1, wherein the model of the D/a video converter is TMC 3033.
10. The intelligent digital television set according to claim 1, wherein the D/A audio converter is model MXT 8211.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921469086.7U CN210629669U (en) | 2019-09-04 | 2019-09-04 | Intelligent digital television |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921469086.7U CN210629669U (en) | 2019-09-04 | 2019-09-04 | Intelligent digital television |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210629669U true CN210629669U (en) | 2020-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921469086.7U Active CN210629669U (en) | 2019-09-04 | 2019-09-04 | Intelligent digital television |
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| Country | Link |
|---|---|
| CN (1) | CN210629669U (en) |
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2019
- 2019-09-04 CN CN201921469086.7U patent/CN210629669U/en active Active
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