MPEG-4 Encoding & Decoding Solution

The TC35273XB is a single-chip, low-power MPEG-4 encoding and decoding (CODEC) solution. This new chip integrates an MPEG-4 CODEC with 12-megabits (Mb) of embedded DRAM to deliver a low-power, end-to-end solution with encoding, transmission and decoding functionality that fully supports the MPEG-4 industry standard.

The new single-chip MPEG-4 CODEC features 12Mb of embedded DRAM reducing power dissipation to 80-milliwatts (mW). This is a significant decrease when compared to similar solutions using off-chip memory. As a result, the solution has the potential to more than double the battery life in a mobile videophone compared to the same phone using off-chip memory.

The product performs 15 frames per second into a QCIF (176 x 144 pixels) video display, along with an audio CODEC that can support multiple audio CODECs including Adaptive Multi Rate (AMR) speech CODEC at a clock frequency of 70-megahertz (MHz). Three signal processing units, an MPEG-4 video codec, an audio CODEC/decoder, and multiplex/demultiplex unit are integrated on the single-chip. The video core consists of a 16-bit RISC processor and dedicated hardware accelerators that allow programmability while delivering high performance and low-power dissipation. The firmware program for the RISC processor is downloaded into the embedded DRAM before beginning any operation. Additional applications, such as H.263, are performed by using the appropriate firmware. Features also include a general host interface in order to support various host processors, as well as a special-designed gating input/output(I/O) that allows power supply to be cut-off to the internal circuits while keeping the I/O activated.

Toshiba America Electronic Components/Taec, 9775 Toledo Way, Irvine, CA 92618. Tel: (800) 879-4963 ext. 263; Fax: 949-859-3963.