ES4227

• Single-chip MPEG-2 video/audio decoder and system parser in 208-pin PQFP package.
• 640 x 480 NTSC and 640 x 576 PAL television video resolutions supported.
• Software-configurable for Internet e-mail and web browser functions.
• Karaoke, On-Screen Display (OSD), Playback Control (PBC) for Video CD 2.0 and 3.0 and trick mode functions supported.
• VideoCD 1.1, 2.0, Interactive 3.0, Super VCD and Audio CD compatible (SVCD and DVD configurations only).
• SmartScale™ video scaling supports both X-axis and Y-axis interpolationa and bidirectional NTSC to PAL and PAL to NTSC conversion.
• SmartZoom ™supports 4X picture enlargement and reduction
• SmartStream™ supports video bit stream error concealment.
• Multi-standard TV encoder in 100-pin PQFP package supports CCIR601 non-square operation, NTSC/PAL formats, simultaneous composite and S-video output, and interlaced operation.
• Two programmable 16-bit sigma-delta audio DACs accept I2S format data, and provide dual audio output with SNR better than 90 dB.
• Dual microphone input and vocal assist hardware support provided.
• PLL clock synthesizer based on 27 MHz crystal input generates required clocks for video encoder, audio DAC, echo and surround sound, and video processor.
• Device Serial Communication (DSC) port for command issued/register access.
• Digitally controlled echo with up to 130 ms delay.

The ES4228 MPEG video/audio decoder works as the central processing unit for Internet set-top box applications, while the ES4227 companion chip integrates all of the necessary discrete components for Internet set-top boxes. The high level of flexibility and versatility provided by the ES4228/ES4227 chipset makes it the most cost-effective, high-performance solution for the Internet set-top box market.

The ES4228 includes a programmable internal RISC processor core that makes it adaptable for use in embedded systems applications such as set-top boxes. The ES4227 companion chip supplies proper video sync capabilities and performs NTSC- and PAL-based video encoding and decoding as necessary to provide broadcast quality video to the television screen.

The ES4227 is a mixed-signal chip that includes a high quality NTSC/PAL encoder, two programmable 16-bit sigma-delta audio DACs, a PLL clock synthesizer, two microphone A/D converters, an I/O expansion port, and an echo/surround sound circuit.

The ES4228 controls the ES4227 through a proprietary bus, the Device Serial Communication (DSC) bus. The ES4227 gets video input and audio input from the ES4228. Video format is 8-bit YUV, and audio format is I2S.

Command and register accesses are issued through the DSC interface from the ES4228 to the ES4227 through the DSC interface for accessing the internal registers of the ES4227. The DSC interface port is comprised of three interface signals, the strobe (DSC_S), data (DSC_D), and clock (DSC_C).

The DSC port is selected when the DSC strobe goes high and latches the data at the rising edge of the clock. Each 16-bit DSC transfer is comprised of an address followed by data.

The digital video encoder of the ES4227 uses three 9-bit video DACs to generate composite and S-video analog signals. One video DAC handles the composite video output, while the other two handle the S-video outputs. Color space conversions are provided to match the input data to the required output format, then the data is filtered to meet the selected video standards.

The programmable audio DACs of the ES4227 offer differential audio outputs. These outputs ensure further noise reduction while providing a dual audio output with a signal-to-noise ratio better than 90 dB. The expansion I/O port is address-mapped to the ES4228. Four pins of the port can be configured as edgetriggered interrupts, supporting critical functions such as handling remote control and modem interrupt requests, DVD/SVCD loader resets and modem board resets.

The ES4228 is available in an industry-standard 208-pin Plastic Quad Flat Pack (PQFP) package, while the ES4227 is available in an industry-standard 100-pin PQFP package.