东芝美国电子元件股份有限公司(TAEC)日前扩充其中低端数字电视应用tc904xx家族高度集成、单芯片SoC解决方案，推出了第二代产品。两个版本为tc90407xbg和tc90407fg，新的SoC是专门为北美电视标准包括先进电视系统委员会(ATSC)和有线数字电视标准。比起上一代器件集成了更多的芯片功能模块、减少了成本和支持新的算法，画面质量大大改善。

新器件集成了针对ATSC和有线电视标准的残留边带(VSB)和正交幅度(QAM)解调。该公司还为ODM和OEM客户推出了两种新的附加模块，简化设计到生产的时间：DLVM-GC针对液晶电视而DLVM-GL针对数字电视。这些模块允许现有的模拟CRT或模拟液晶电视轻松转化为ATSC制式。

第二代高度集成的SOCStc90407xbg和tc90407fg中低端数字电视芯片集成了高性能64位MIPS RISC处理器和两个高度优化的DSP，专为计算密集型多媒体任务。解码器能够处理单通道标准清晰度或高清晰度流，包括720×480或1,080×960。以下是两款芯片共有的特点·A 162MHz TX49/L3 64-bit RISC processor core with 8KB instruction cache and 8KB data cache, a unified memory system, a 16-bit, 162MHz DDR SDRAM controller, and NAND/NOR Flash support

·An integrated 8-VSB and 64/256 QAM demodulator for ATSC TV

·A transport stream processor that is fully compliant to ATSC standards and cable transport streams

·A video decoder for standard-definition decoding. It supports MPEG-2 decoding (MP@ML and MP@SL) and MPEG-1 decoding.

·A video decoder for high-definition decoding. It supports MPEG-2 decoding for MP@HL for ATSC and digital cable. A high-definition decoded stream CAN be displayed in high-definition resolution up to 960 x 1080 and is 720p or 1080i compliant. It also has high-definition to standard-definition down-conversion for display in standard-definition resolution.

·An audio processor with MPEG- Audio and Dolby AC-3 decoding plus an I2S and S/P-DIF transmitter (IEC-60958/61937)

·A graphICs engine with two planes for YUV/graphics, alpha blending, video scaling and progressive scan with I/P conversion through line-interpolation

·Video output using a dual NTSC video encoder and 4 DACs that support two 480i analog outputs for standard-definition or one 720p/1080i output for high-definition. It provides 4:2:2 YUV digital-output (ITU R656/R601), VBI re-insertion with closed-caption and CGMS-A, and interlaced or progressive output.

·A wide range of interfaces and peripherals: a 8/16-bit 40.5 MHz LOCal bus for NAND/NOR flash and other I/O devices, a two-channel DMA controller, two sets of SIO interface (UART), ten PIOs, three 24-bit timer/counters, two sets of I2C interface, an IR-decoder and an IR-blaster

·Has power-down and standby operations

·A complete reference system with SOFtware and middleware support for quick product deployment

·Software and middleware based on the MontaVista Linux operating system from MontaVista Software, Inc.

·Common application program interface support for middleware and application development

·PACkaging: TC90407XBG is housed in a 292-PIN PBGA package while TC90407FG is offered in a 256-pin LQFP package

tc90407xbg样片目前可提供，量产计划于2007年4月。tc90407fg样片预定将于2007年第一季度提供。十万件采购量价格在15至18美元(基于一年量产订单)。DLVM-GC和DLVM-GL参考设计模块目前可以从TAEC获得。