Transcript
10/17/2001
Version 0.7
VW2010 MPEG-1, 2 & 4Audio/Video CODEC Preliminary Product Brief Vweb, a leading provider of video compression and decompression chips, has created the VW2010, a simultaneous MPEG-1, 2, 4 and H.263 A/V compression/decompression (CODEC) chip. The VW2010 accepts uncompressed audio & video, compresses them and outputs them as transport streams for network applications or program streams for storage applications. In addition, the VW210 accepts compressed audio & video, decompresses them and separately outputs uncompressed audio and video. The video encoder accepts ITU-R BT.656 digital video, filters the input and compresses the video into MPEG-1, 2, 4 or H.263 formats. The audio encoder accepts I2S digital audio, filters the input and compresses the audio into MPEG-1, MPEG-2, MP3, AAC, AC-3 or G.7xxx audio formats. The video decoder accepts an MPEG bit-stream and outputs ITU-R.BT 656 digital video. The audio decoder accepts an MPEG-1, MPEG-2, MP3, AAC, AC-3 or G.7xxx bit-stream and outputs I2S, SP-DIF or IEC-1937. Using Vweb’s patent-pending motion estimation and rate control algorithms, Vweb is able to create high-quality MPEG products. The VW2010 is the latest in the line of MPEG products from Vweb. Its features include:
1 Feature List Video Encoding • MPEG-1 and MPEG-2 MP@ML • MPEG-4 Simple Profile@L3 extended to interlaced D1 resolution. • Adaptive field/frame motion compensation • 4:2:2 to 4:2:0 conversion • Motion estimation search range +/-127 horizontal PEL and +/- 63 vertical PEL with half-PEL accuracy • Frame rates between 1 and 29.97 (NTSC) or 25 (PAL) frames per second. • Constant or variable bit-rate from 10Kb/s to 15Mb/s. • Any horizontal resolution between 64-pixels and 720pixels in 16-pixel steps • Any vertical resolution between 64-pixels and 480-pixels (NTSC) or 576-pixels (PAL) in 16-pixel steps • GOP structures: I, IP, IBP and IBBP Audio Encoding • MPEG-1 Layer I, II and III (MP3) • MPEG-2 Layer I, II • 2-channel AAC • 2-channel consumer-grade Dolby AC-3 • G.7xx • Sampling frequencies: 8KHz, 16KHz, 22.05KHz, 24KHz, 32KHz, 44.1KHz, 48KHz and 96KHz. Video Decoding • MPEG-1, MPEG-2 and MPEG-4 decoding
• 7-tap Horizontal filter and 2-tap Vertical filter • Letterbox conversion from 16:9 to 4:3 • 3:2 pulldown • Closed Captioning and Teletext Audio Decoding • MPEG-1 Layer I, II and III (MP3) • MPEG-2 Layer I and II • 2-channel AAC • 5.1 and 2-channel consumer grade AC-3 • G.7xx Muxing Features • ES or PES output • MPEG-1 System Stream • MPEG-2 Program or Transport Stream o MPEG-4 video is embedded in MPEG-2 TS or PS • User Data Insertion Demultiplexing Features • System, Program and Transport Stream Demultiplexing • Filters for PCR, video, audio, subtitle, Teletext and PSI data • 5 output buffers for video, audio, subtitle, Teletext and PSI
Graphics • • • • • •
8-bit color indexing A 32-bit ARGB 8:8:8:8 graphic plane A video scalar (windowing) Per pixel alpha blending A deflicker filter A separate cursor plane
2 Interfaces General System Facts • A 162MHz Risc Processor with DSP extensions for Multiplexing, Demultiplexing, Audio Encoding and Audio Decoding • 6 GPIO pins (including 2 I2C-like pins) • 348-pin PBGA package. 1.8V (internal). 2.5 V (I/O) • Estimated power of 0.8W in normal operating mode • IEEE1149.1 compliant boundary scan and assembly testing (JTAG) Host Interface • A 16-bit Motorola-style and Intel-style I/F • 32-bit and 33MHz & 66MHz PCI. • An I2C-like interface SDRAM Interface • Two 4MB 166MHz SDRAM chips Input Interface Decoder • PCI I/F, 8-bit parallel or 1-bit serial I/F Audio Encoder • PCI I/F, I2S input or IEC-9058 SP-DIF (converted to I2S signaling) Input (Digital) Video Encoder • PCI I/F or ITU-R.BT 656 8-bit I/F Output Interface Video Decoder • ITU-R.BT-656 8-bit I/F Audio Decoder
____________________________________________________________________________________________ 5300 Stevens Creek Blvd., Suite 320, San Jose, CA 95129
Tel: (408) 615-1888
URL: www.vwebcorp.com
10/17/2001
Version 0.7
• PCI I/F, L/R Decoded channels, I2S, IEC-9058 SP-DIF Output (Digital) or IEC-1937 Compressed Audio (Pass Through) Encoder • PCI I/F, 16-bit host interface,8-bit parallel or 1-bit serial CDO I/F
4 Applications The VW2010 is ideally suited for the following consumer applications: • Personal Video Recorder • Set-top boxes • PC Capture devices for video capture, content creation and display • VCD, Super-VCD and DVD Player and Recorder • Cellular phones and PDAs In addition, the VW2010 is suited for the following network applications:
3 Feature/Benefits Table Features
Benefits
• Uses less than 8MB of external SDRAM • Proprietary motion estimation search • Easy to setup and configure
Saves Money & Power
• The rate control algorithm monitors 60 different variables, which results in a more consistent GOP structure; thus, scene changes are handled well. • Dynamically programmable frame rates, bit rates, resolution and GOP structure. • Transcoding & Transrating among MPEG-1, 2 & 4 and H.263 • MPEG-4 Full-D1 Interlaced CODEC • Low latency support • H.263-baseline support
Decreases time to market Superior Video Quality
• Transcoding/Transrating among MPEG-1, 2 and 4 • Video distribution over DSL, Cable, Ethernet, Fiber and Wireless Networks • Video conferencing • Digital surveillance • Video on demand servers
Superior Flexibility
5 Deliverables Vweb provides a PCI-based evaluation board with WDM drivers and a user-interface for video capture, compression and playback.
Superior Ingenuity
Figure 5-1 Block Diagram of Vweb’s VW2010
ITU-R-656 8 or 10-bit Video I/F
Motion Estimation
Video Input Unit
Video Encoding
Mode Select
Rate Control
Mux
Motion Refinement
Audio Input Unit
I2S Audio I/F
I2C I/F
Digitized Audio
I2C
8MB of SDRAM
16-bit host I/F PCI I/F
Audio & Video
Risc w/ DSP extensions Processor (162MHz)
Video Output
TS, PS, SS, PES
PCI Overlays
MPEG data MPEG data 8-bit parallel or 1-bit serial
Audio
Audio, Closed Caption, Teletext
Demux
VLD
Motion Compensation
Video Decoder
Graphic Unit
Audio Output Unit
L/R Audio, SPDIF I2S IEC 1937
Video Output Unit
ITU-R-656 8-bit Video
____________________________________________________________________________________________ 5300 Stevens Creek Blvd., Suite 320, San Jose, CA 95129
Tel: (408) 615-1888
URL: www.vwebcorp.com
