特性 Features

□ TC35273 is an MPEG-4 audiovisual codec LSI which supports 3GPP 3G-324M video telephony system. MPEG-4 video codec with QCIF (176x144 pixel) at 15 frames/s, AMR (Adaptive Multi Rate) speech codec, and ITU-T H.223 are executed concurrently at around 70MHz clock rate.

□ Three signal processing units, an MPEG-4 video codec, a speech codec / audio decoder, and a multiplex / demultiplex unit, are integrated on a single chip.

□ A 12-Mbit embedded DRAM is integrated as a shared memory for the three signal processing units. The embedded DRAM helps to reduce power consumption without performance degradation.

□ Each signal processing unit consists of a 16-bit RISC processor and dedicated hardware accelerators so as to bring programmability, high performance and low power consumption.

□ Firmware programs for the RISCs are downloaded into the embedded DRAM before starting operation. Various applications are performed by choosing an appropriate firmware.

□ General host interface are adopted in order to support various host CPU.

□ 2.5x to 6x of PLL is integrated on the chip for easy system integration.