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The VW4012 is a real-time H.264 SD decoder and MPEG-1,-2,-4 audio/video/ system CODEC chip (simultaneous encode/decode) that fully complies with the following standards: MPEG-1, MPEG-2 MP@ML, MPEG-4 ASP Part 2 Level 5, H.263 baseline for encoding, and MPEG-1, MPEG-2 MP@ML, MPEG-4 ASP Part 2 Level 5, H.263 baseline and H.264 HPa/ MP/BP Level 3.0 for decoding. The VW4012 accepts uncompressed ITU-R. BT-656 video and I2S audio, it com-presses the video into MPEG-1,-2,-4 or H.263 format, it compresses the audio into MPEG-1 L1, L2, MP3, AAC LC, AC-3, G.711, G.723.1a, G.726 or G.729 audio format, and outputs them as transport stream for network applications or program stream for storage applications. In addition, the VW4012 accepts an MPEG-1,-2 -4 / H.263 / H.264 bit stream input, and out-puts ITU-R.BT-656 video, and it also accepts an MPEG-1 L1, L2, MP3, AAC LC, AAC HE, AC-3, G.711, G.723.1a, G.726 or G.729 audio bit stream input, and outputs audio through I2S, S/P-DIF or IEC-61937.
Video Encoding • MPEG-1 • MPEG-2 MP@ML • MPEG-4 Advanced Simple Profile (ASP) Part 2 Level 5 • H.263 Baseline • Support for I, B, P pictures • Macro-block adaptive field/frame and DCT type • 4:2:2 to 4:2:0 conversion • Scene change detection • Inverse telecine (inverse 3:2 pull-down) • Motion estimation search range +/-127 pels horizontal and +/-63 pels vertical, with half-pel accuracy • 8-tap horiz. filter and 4-tap vert. filter • Extraction of VBI data • Private and user data insertions from VBI or host/PCI port

• Fixed frame rates of 29.97 (NTSC) or 25 (PAL) frames per second, or variable frame rates in low delay mode • Constant bit rate (CBR) or variable bit rate (VBR) from 64 kbps to 15 Mbps • Horizontal sizes from QSIF to D1, or 176 to 720 pixels in 16-pixel steps • Vertical sizes of 120, 144, 240, 288, 480, 512, 576 lines (NTSC) or 144, 288, 576, 608 lines (PAL) • Programmable GOP structure and length: I IP IBP and IBBP • Programmable low delay mode • Preprocessing filter • Low latency < 200 ms point-to-point
• 4 SIF (quad stream mode: 4 different video stream outputs) @ 30 fps • 2 half-D1 (2 different video stream outputs) @ 30 fps • Full D1 and SIF/QSIF (dual stream mode: same video source at two different resolu-tions) • Multi-region Motion Activated Recording (MAR) • Quantization control with Qmin, Qmax for I-Frame and P/B-Frames • Extended resolution coding for VBI (eVBI) • Transcoding and transrating among differ-ent supported standards • Simultaneous encode/decode with preview at selected resolution (D1, CIF, QCIF) • VR format support for DVD applications
: http://www.vwebcorp.com
언제나 고객여러분에게 최선을 다하는 명민시스템이 되겠습니다.