H.264トランスコーダLSI

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1 H.264 LSI H.264 Transcoder LSI あらまし MPEG-2 H.264H.264 LSI LSI USB 2.5 W PCI Express Mini Card30 mm mm BSCS PC-TV PVR Abstract Video data are compressed in MPEG-2 format for use in terrestrial digital broadcasting and such like. To extend the recording time and reduce network traffic, it is necessary to convert such data into H.264 format, which features an even higher compression rate, and also convert data in H.264 format into data of a lower bit rate. This paper introduces an LSI capable of transcoding, which is necessary for these conversions in real time. This LSI uses a transcoding method that is regarded as being the most advantageous in terms of image quality. With this method, encoded video data are decoded once and then re-encoded to minimize the degradation of video quality caused by the conversion processing. The LSI, which has also been given a small size and low power consumption to allow it to operate with USB bus power (up to 2.5 W) and be used in devices with the size of a PCI Express Mini Card ( mm), is mainly used at present for PC-TVs and PVRs with a view to achieving long time recording of broadcasting including terrestrial digital, BS digital and CS digital broadcasting. As mobile devices such as smartphones and tablets have become widespread recently, the demand for viewing and recording videos via a network is increasing and it is hoped that the adoption of this LSI will reduce network traffic and convert data into video formats that allow them to be decoded on mobile devices. Fujitsu Semiconductor is working on coming up with new solutions to support these applications. 388 FUJITSU. 63, 4, p , 2012

2 H.264 LSI まえがき 1 H.264 LSI HD HD HD H.264 LSI MB86H LSI1 LSI MB86H LSI MB86H57 MB86H LSI MB86H57 MB86H58 3LSI MB86M01 MB86M02 MB86M03MB86M0x MB86M0x LSI 現行製品の課題 MB86H57 MB86H58 1 MPEG-2 H.264 H HD 1 MPEG-2H.264 LSI HDHD 2 HD QVGA 3 USB USB / 2 CPU LSI 1 6 USB USB USBUSB MB86M0x の概要 MB86M0x MB86M0x 図 -1 H.264/MPEG-2 / LSI MB86H57 MB86H58 MPEG-2 H.264HD H.264H.264 / / FUJITSU. 63, 4 07,

3 H.264 LSI /JPEG /JPEG 8 bit/ PCI Express USB 8 bit/ MULTI2/AES AES PLL FCRAM 1 Gbit FCRAM / JPEG H.264/MPEG-2 / I 2 C SPI B-CAS SiP -1 MB86M0x TS/MP4 TS/MP4 MB86M0x JPEG / AESMULTI2/AES1 Gbit FCRAM Fast Cycle RAM FCRAM SMPTE 274M/296M-2001 ITU-R BT.656 I 2 S CPU JPEGPCI Express/ USB I 2 C/SPI/B-CAS LSI PLL 11 Gbit FCRAM1 HD H W -2 MB86M0x 13 mm 0.8 mm21 mm MB86M0x 図 -2 表 FUJITSU. 63, 4 07, 2012

4 H.264 LSI SiP -1 MB86M0x MPEG-2 TS MP4 MPEG-2HD H.264HD/SD H.264SD/QVGA H.264HD H.264HD/SD H.264SD/QVGA MPEG-2HD MPEG-2SD H.264HD MPEG-2SD 1.n 2 MPEG-2/4 AAC-LC HE-AAC MPEG-1 Audio Layer2 Dolby Digital AC-3 Re-mux ARIB Data Closed Caption Teletext H.264 HD/SD/QVGA MPEG-2 SD MPEG-2/4 AAC-LC HE-AAC MPEG-1 Audio Layer2 Dolby Digital AC-3 PCI Express USB2.0 Device Stream-I/F Serial or 8bit Parallel 2 input 3 output streams Video I/F SMPTE 274M/SMPTE296M-2001 ITU-R BT.656 Audio I/F I 2 S AES/MULTI-2 JPEG QVGA I 2 C SPI-ROM EEPROM I/F B-CAS I/F 1.1 W typ. MPEG-2 HD to H.264 HD 1.2 W typ. H.264 HD to H.264 HD 1 Gbit FCRAM MB86M01 FBGA mm 0.5 mm MB86M02 FBGA mm 0.8 mm MB86M03 FBGA mm 0.65 mm PCI Express 主な特長 MB86M0x 1 H.264 MPEG-2 H.264 H.264 H.264 HD H.264 MPEG-2/4 AAC-LC HE-AAC Dolby Digital AC-3 2 MPEG-1 Audio Layer2 2 B-picture 3 4 USB PCI Express /USB 2 5 USB USB USB USB 2 Dolby FUJITSU. 63, 4 07,

5 H.264 LSI 6 QVGA SD システム構成例 MB86M0x 1 USBTV 図 -3 TV STB Set Top BoxUSB USB AC 2 Wi-Fi TV 図 -4 TV HD 3 図 -5 2 / 4/ BOM B-CAS 41 今後の開発予定 Wi-Fi TV CPU LSIHD 4K2K K2K MB86M03-3 USBTV MB86M02 CPU Wi-Fi -4 Wi-Fi TV 392 FUJITSU. 63, 4 07, 2012

6 H.264 LSI LSI MB86M01 B-CAS MB86M LSI Wi-Fi TV CPU LSI HDD LSI LSILSI CPU ARMCortex TM -A9 500 MHz USB2.0/3.0 S-ATA PCI Express Gbit Ether MAC 1 2 4K2K HEVC HD 4K2K 2012 International CES 4K2K TV Intel CPU Ivy Bridge 4K2K 4K2K 4K2K HD 4 H HEVC High Efficiency Video CodingISO/IEC MPEG ITU-T VCEG JCT-VC Joint Collaborative Team on Video Coding K2K HEVC むすび LSI HDLSI LSI MB86M0x FUJITSU. 63, 4 07,

7 H.264 LSI LSILSI 4K2K HEVC 参考文献 1 HDH.2641 LSI 2 HD H.264 LSI 3 H.264/MPEG-2 HD LSI 著者紹介 田中和幸 ( たなかかずゆき ) LSI 394 FUJITSU. 63, 4 07, 2012

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