KR100619700B1 - Apparatus for controlling micom of wireless tv - Google Patents

Abstract

The present invention relates to an apparatus for controlling a microcomputer of a wireless TV. In the related art, a CPU embedded in a transmission box of a wireless television controls a microcomputer chip, which affects the wireless LAN control of the CPU and degrades the performance of the wireless TV. . In view of the above problems, the present invention relates to a system of a wireless TV including a microcomputer unit that operates independently and processes a TV function in a transmitter box of a wireless TV, and the microcomputer unit and a wireless LAN. The CPU unit and the microcomputer and the CPU unit are respectively built in the UART controller is configured to control the microcommunication unit and the CPU unit to transmit a message for performing the operation by the UART (Universal Asynchronous Receiver Transmitter) communication method There is an effect that can effectively control the TV microcomputer chip without affecting the performance.

Description

Wireless TV's MICOM control device {APPARATUS FOR CONTROLLING MICOM OF WIRELESS TV}

1 is a block diagram of a typical wireless TV.

2 is an internal configuration diagram of a transmission box according to the present invention.

Figure 3 is an illustration of a message packet according to the present invention.

4 is a table showing message types according to the present invention;

** Description of the symbols for the main parts of the drawings **

10: LCD TV 20: Send Box

30: TV antenna 40: External AV device

100: CPU unit 110: CPU

111: PCI controller 112, 311: UART controller

120: wireless LAN 130: flash memory

140: DRAM 200: encoder

300: TV microcomputer 310: microcomputer

320: TV tuner 330: Video ADC

340: audio ADC

The present invention relates to a microcomputer control device for a wireless TV, and more particularly to a microcomputer control device for improving the control function of the CPU using a UART controller for communication between the CPU inside the transmitter box (Transmitter Box). .

In addition to mobile phones and computers, the era of wireless has started in earnest in TVs. When connecting peripheral devices such as TV RF cables and DVDs to a separate transmitter box, they can be transmitted wirelessly to a TV set. And wireless TVs that can use peripheral devices have been developed. Wireless TVs can be installed anywhere regardless of electricity, cables, antenna lines, etc., making them easy to utilize space.

In addition, since the Media Browser Program is built-in, contents such as photos, MP3s, and videos in a PC where a wireless LAN is installed can be viewed wirelessly through a wireless TV.

In general, a wireless TV is largely composed of two parts, a transmission box and an LCD TV. The main body, called the transmission box, consists of a cable box, satellite receiver, video cassette recorder, DVD player, etc., the size of a book, and the LCD TV has a built-in rechargeable battery, and on both sides of the LCD (Liquid Crystal Display) screen It is equipped with stereo speakers.

In general, LCD TVs can be moved freely within 15 meters of the transmission box, and unlike conventional CRT (Cathode-Ray Tube) TVs, they are small in weight and volume and can be placed on a desk or table for viewing.

1 is a block diagram of a general wireless TV, and as shown therein, a transmitter box 20 connected to an external AV device 40 such as a TV antenna 30 and a DVD player for receiving a TV signal, The transmission box 20 and the LCD TV 10 is wirelessly connected via 802.11g.

The transmission box 20 encodes a TV signal into an MPEG file and transmits it to the LCD TV 10 through a wireless LAN, and the LCD TV 10 decodes the transmitted MPEG file and displays it on the screen. do. In addition, the transmission box 20 includes a microcomputer chip for processing TV signals, an encoding chip for encoding MPEG files, and a CPU chip for wireless LAN and all other chips, all of which operate in-house. This is possible, and the part that controls the encoding chip in the CPU has already been developed.

Here, the microcomputer chip performs general TV functions such as channel, video, and audio to display information on the screen, and serves as a central processing unit (CPU) for controlling all other components in the TV product.

However, the way of controlling the microcomputer chip is to control all the CPUs and use only the microcomputer's TV function. Since the microcomputer chip is controlled by the CPU despite being able to control itself, the wireless LAN is controlled. CPU original function is degraded.

 As mentioned above, in the prior art, the part which has a big influence on the performance of the wireless TV is the control of the wireless LAN. Since the CPU controls the microcomputer chip, the control of the wireless LAN of the CPU affects the performance of the wireless TV. There is a problem.

Accordingly, the present invention has been made in view of the above problems, and the UART (Universal Asynchronous Receiver Transmitter) controller is mounted on each of the general CPU and the microcomputer chip of the wireless TV, and the UART communication method is used to control the microcomputer chip from the CPU. It is an object of the present invention to provide a microcomputer control device for a wireless TV that can improve the control function of the CPU.

In order to achieve the above object, the present invention provides a wireless communication system including a microcomputer unit that operates independently and processes a TV function in a transmitter box of a wireless television, and the microcomputer unit and a wireless LAN. The CPU unit for controlling the overall system of the TV, and the microcomputer unit and the CPU unit, respectively, to control the microcommunication unit and the CPU unit to transmit a message for performing the operation by the UART (Universal Asynchronous Receiver Transmitter) communication method It is characterized by consisting of the UART controller.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is an internal configuration diagram of a transmission box according to the present invention. As shown in FIG. 2, a CPU unit which controls overall operation of each component of a wireless TV and outputs image data by processing a TV signal received through a wire (100), an encoder (200) for MPEG encoding the video data output from the CPU unit (100), and a TV microcomputer unit for receiving MPEG encoded video data and processing the video data according to a general TV function. It consists of 300.

Here, the CPU unit 100 includes a CPU 110 including a PCI controller 111 and a UART controller 112, a wireless LAN 120, a flash memory 130, and a flash memory 130. And a dynamic random access memory (DRAM) 140, and the TV microcomputer unit 300 includes a microcomputer 310 including a UART (Universal Asynchronous Receiver Transmitter) controller 311 and a TV tuner 320. And a video ADC (Analog Digital Converter) 330 and an audio ADC 340.

First, the CPU 110 converts a TV signal received by a TV antenna (not shown) through a wired cable into a digital signal, and transmits it to the encoder 200 through a peripheral component interconnection controller (PCI) 111. .

Thereafter, the digitally converted video signal and audio signal are input to a video input terminal (not shown) and an audio input terminal (not shown) of the encoder 200 and are encoded in an MPEG method. Then, the video signal and the audio signal compressed by the encoder 200 are transmitted to the microcomputer 310 via the video ADC 330 and the audio ADC 340, respectively.

In this case, the characteristic is that the microcomputer 310 does not operate under the control of the CPU 110, but both the CPU 110 and the microcomputer 310 operate independently and communicate with each other in an interrupt manner to perform an operation. Is to give and receive. Therefore, the CPU 110 transmits a command for a required function to the microcomputer 310, and the microcomputer 310 processes the result and responds to the CPU 110 with the result.

The CPU 110 and the microcomputer 310 each have a built-in UART controller 112 to transmit a command message from the CPU 110 to the microcomputer 310 through a UART port (not shown). In response, the microcomputer 310 transmits a reply message to the CPU 110. Since asynchronous UART communication is operated in an interrupt manner, the CPU 110 and the microcomputer 310 can perform their own operations without having to wait for the operation of the counterpart chip to finish. Interrupts are generated and processed when communication with each other is required. do.

As shown in FIG. 3A, the command message includes a command area including information on a command type of 1 byte, and a 1-byte MSG including information on a message serial number. It consists of an ID area and a two-byte data area including specific information for performing an operation according to the command. In addition, the response message includes a 1-byte response (REPLY) area including information on the response type corresponding to the received command message as shown in FIG. 3 (b), and information on the message serial number. It consists of a 1-byte MSG ID area and a 5-byte data area including specific information about the response type.

Here, the command area and data area constituting the command message and the response area and data area constituting the response message corresponding thereto refer to the diagram of FIG. 4.

As a function of wireless TV provided through the UART communication method, a power on / off function, a channel function, an input signal function, a video function, an audio function, and a subtitle processing that turn on / off the wireless TV function There is a caption function, and a V-Chip function that sets a user usage level in North America. Here, the channel function includes channel setting, channel up / down, channel saving / clearing, automatic channel search, moving to the previous channel, favorite channel setting function, and the input signal function includes a function for selecting an input signal as TV or video. do. In addition, the image function includes a function for setting contrast, clarity, color, and color intensity by user definition, and the voice function includes functions of balance adjustment, automatic response, and stereo mode selection by user definition.

As described in detail above, the present invention has the effect of efficiently controlling the TV microcomputer chip without affecting the CPU performance. In addition, the present invention has an effect that can be easily applied to similar products in the future by defining the TV-related message types and types.

Claims (4)

In the transmitter box of the wireless TV, The microcomputer unit which operates independently and processes TV function, A CPU unit for controlling the overall system of the wireless TV including the microcomputer unit and the wireless LAN; The UTV controller is built in the microcomputer unit and the CPU unit, respectively, the microcomputer unit and the CPU unit is configured to control the UART (Universal Asynchronous Receiver Transmitter) communication method to transmit a message for performing the operation of the wireless TV, characterized in that Micom control unit. The method of claim 1, The UART controller embedded in the CPU unit transmits a command message necessary to perform a wireless TV operation to the micom unit using a UART communication method, and the UART controller embedded in the microcomputer unit receives the command message. And a reply message corresponding to the CPU to the CPU unit. The method of claim 2, The command message is composed of a command area including information of a command type to be executed by Micom, an MSG ID area including information of a message serial number, and a data area including information required to execute a corresponding command. Micom control unit of wireless TV. The method of claim 2, The response message includes a reply area including information on a response type, an MSG ID area including information of a message serial number, and a data area including information required for a corresponding response type. Micom control unit.

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