ES4228/ES4227
Internet Set-Top Box Solution
Product Brief
DESCRIPTION
ES4228 FEATURES
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.
• 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.
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.
• SmartZoom ™supports 4X picture enlargement and reduction
• SmartStream™ supports video bit stream error concealment.
ES4227 FEATURES
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.
• 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
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.
required clocks for video encoder, audio DAC, echo and
surround sound, and video processor.
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.
• Device Serial Communication (DSC) port for command issued/
register access.
• Digitally controlled echo with up to 130 ms delay.
SOFTWARE SUPPORT
• Software stack support for the POP3, SMTP and SNMP Internet
e-mail protocols defined by RFC 821, RFC 1157and RFC 2449.
• Software stack support provided for the HTTP Web browsing
protocol defined by RFC 1945, RFC 2068 and RFC 2616.
• Software stack support provided for the TCP/IP Internet
protocols defined by RFC 791 and RFC 793.
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 edge-
triggered interrupts, supporting critical functions such as
handling remote control and modem interrupt requests, DVD/
SVCD loader resets and modem board resets.
• Software stack support provided for RTP payload format for
MPEG-1/2 and H.261 video streaming protocols defined by
RFC 2032, RFC 2038 and RFC 2250.
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.
• Character generation and software support for English,
Big 5/GB Chinese and Japanese fonts.
• Software support for infrared remote control and wireless
keyboard.
ESS Technology, Inc.
SAM0378-053001
1
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