subject: High Definition Television Image Processing Chip Applications Analysis (figure) [print this page] PLM1000 is a crystalline Poly Microelectronics Co., Ltd. by the development of normal CRT TV designed specifically for analog / digital hybrid processing chip, the product can enter the analog TV signal Digital Then digital signal processing, and finally restore the digital signal to analog TV signal output to the analog TV. Its main function is to handle 480p, 576p, 720p, 1080i, 1080p, etc. HD VGA analog signal and the signal is converted to 480i, or 576i standard definition analog signals, and supports the brightness, color, color saturation adjustments, support for color space conversion.
In the crystal sea Polly Microelectronics and technology companies together with the promotion, current PLM1000 CRT manufacturers have received approval, and put a lot of use.
PLM1000 system design principles Figure 1 is a schematic PLM1000 system design applications. PLM1000 will HD Equipment, computers, high-definition signal or the analog VGA signal is converted to standard definition of the YUV signal, the analog input to the common CRT TV show. PLM1000 system board is very simple, including PLM1000 chips, crystal and 3.3V/1.8V Power supply .
Figure 1: PLM1000 system program structure diagram.
System power, the external MCU chip Power-on PLM1000 initialization, perform the necessary configuration registers. After power-on initialization, MCU read PLM1000 chip automatically formats the test results, and according to rules set in advance to judge the current input signal format, written in a format corresponding to the input signal register allocation, PLM1000 the output standard 480i, or 576i format CRT TV signal to the weight of ordinary analog input, subsequent treatment and handling of ordinary analog CRT TV the same.
Display properly in the image process, a continuous N times if the test results and the current signal formats are different, the current results set a new format for the chip, MCU close PLM1000 chip video output, and the work of chip configuration parameters corresponding open video output; if the same, to maintain the original configuration, which PLM1000 work in the original format.
PLM1000 sample applications PLM1000 There are two different applications designed to suit different applications and requirements.
Applications 1: Figure 2 shows, this PLM1000 program board is very simple device is PLM1000 and 3.3V/1.8V Power supply And so on, PLM1000 original CRT program in MCU control through I2C bus. The cost of such applications is relatively low, relatively strong function, such as the user can switch PLM1000 the two channels, select the HD input, or VGA computer input, and different sources can be displayed under the input signal format.
Figure 2: The application program based on PLM1000 1 System block diagram.
These applications apply to a number of manufacturers of high-volume, low cost mass production, system integration of better, but need to do more changes to the original system, mainly of the original system software need to increase the control of the PLM1000 and user operations and user menu changes, etc., development more difficult, longer development cycle.
Also provide DIP and QFP64 PLM1000 two package, if you can use the DIP package chips on the floor cloth in the original CRT, can further reduce system cost and after-sales maintenance cost. But most small and medium size CRT TV floor size smaller, with two-panel QFP64 package more appropriate way flapper, flapper interface, only leaving a reasonable YPbPr input, YCbCr output, I2C interface and power supply can be.
Figure 3: The application program based on PLM1000 2 System block diagram.
Applications 2: Figure 3 shows, compared with Option 1, this PLM1000 program more of an independent board MCU, PLM1000 MCU from this independent control, MCU software port and the input signal format auto- switch. Simple circuit board connected to this program, just the power (+5 V), and +1.8 V, +3.3 V voltage difference through the LDO 3.3V with 1.8V access, data input and output cable (YUV) can also can see it into an external device, no need to change TV board (including the hardware with software) design, it can be fixed within the TV, you can connect through the fly line, debugging method is simple, rapid and low cost. Different versions for PLM1000 and different packaging, poly sea technology has Make A sound related products, according customer's actual needs and can adjust the size of circuit board structure, size of the existing circuit board design can be achieved to 45mm? 65mm specifications.
This application program to change the main TV for convenient procedures for SKD sets master chip manufacturing plant material, purchased material common SKD TV sets and other machine manufacturers. Using this program, CRT TV CRT TV manufacturers without modification of hardware and software design of the motherboard, so flexible and easy to use, just need to increase the working procedures as ordinary CRT can be achieved to receive high-definition TV signals, to increase CRT television features, in order to achieve growth Big sales growth and profit objectives. This way of using existing programs, greatly reduce the number of companies pre-development time and cost, flexible response to changes in the market, well received by clients.
Article Summary
As a completely independent intellectual property rights with high-definition television image processing chip, PLM1000 to high-definition images into the homes of ordinary people; the same time, this low-cost high-definition television image processing solutions are also extended CRT TV industry cycle thus boosting the industry's optimal allocation of resources.
