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This paper introduces the design of an IC, which is capable of cross converting between various DTV standards, up to the HDTV resolution. A multi phase FIR based filtering algorithm is developed to perform the video scaling tasks. A dedicated fast SDRAM interface is designed in the system, providing an economical high density storage for frame buffer. Meanwhile, film material pre processing and frame/field rate up conversion are also implemented in the memory control block. Finally, all the programmable parameters, such as the filter properties, can be set dynamically at run time through an I2C interface, making the IC a very flexible system.This design has been verified through an FPGA emulation system. Subjective test of the output images indicates that the IC is a suitable and high quality solution to consumer applications.
This paper introduces the design of an IC, which is capable of cross converting between various DTV standards, up to the HDTV resolution. A multi-phase FIR based filtering algorithm is developed to perform the scaling operations. A dedicated fast SDRAM interface is designed in the system, providing an economical high density storage for frame buffer. Finally, all the programmable parameters, such as the filter properties, can be set dynamically at run time through an I2C interface, making the IC a very flexible system. This design has been verified through an FPGA emulation system. Subjective test of the output images indicates that the IC is a suitable and high quality solution to consumer applications.