Sony HVR1500A Product Brochure (HVR-1500A_Brochure Final 3-08) - Page 3
HDV Format, Versatile Recording & Playback - hdv dvcam vtr
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HDV Format HDV 1080i Specification The HDV 1080i specification*1 for the HDV format features 1,080 effective scanning lines (interlace scanning system) and 1,440 horizontal pixels. It adopts the MPEG-2 compression format (MP@ H-14 for video), which uses 8-bit digital component recording with a sampling rate of 4:2:0. MPEG-1 Audio Layer II is used as the audio compression format, allowing for two-channel recording with a sampling frequency of 48 kHz/16-bit. The HDV 1080i specification provides the high picture quality required for HDTV program production. ■ Track Pattern of the HDV 1080i Specification Direction of tape travel 10 μm Sub Code sector Direction of head motion MPEG-2 PES sector (Video + Audio + Search + AUX) 1/4 inch (6.35 mm) ITI sector ITI: Insert and Track Information PES: Packetized Elementary Stream *1 The HDV format also defines the HDV 720p specification, which features 720 effective scanning lines (progressive scanning system) and 1,280 horizontal pixels. Compatible with Existing and New DV Videocassette Tapes As a member of the proven DV family of formats, the HDV format was developed from the outset to be compatible with all grades of DV videocassette tape. This allows operators to use high-grade DV videocassette tapes for applications where high robustness is critical, or consumer-grade videocassette tapes for more economical operations. For heavy-duty applications, the DigitalMaster™ high-grade cassette tape has been developed. This tape is compatible with the HDV, DVCAM, and DV formats. Versatile Recording & Playback Switchable Recording -HDV 1080i/DVCAM/DV and 60i/50i The HVR-1500A can be switched between HDV 1080i*2, DVCAM, and DV (SP)*3 recording modes, providing full flexibility to record in either standard definition or high definition depending on your production needs. In addition, it can be switched between 60i and 50i systems, eliminating the need for two separate VTRs, one for each standard. *2 In HDV mode, editing capabilities are not available. *3 The HVR-1500A supports DV (SP) mode only; DV (LP) mode is not available. Assemble or insert editing is not supported in DV (SP) mode. Playback Compatibility with DV (25 Mb/s) Family Formats For operational versatility, the HVR-1500A is designed to play back DV (25 Mb/s) family format recorded tapes without a mechanical adaptor and without having to switch playback modes on the menu. DVCPRO™ 25 recorded tapes (M-size cassettes) can also be played back. Long Recording Time The HDV format adopts the same track pitch and tape speed as the DV format, thus offering the same recording time - a maximum of 276 minutes when recording on a PHDV-276DM DigitalMaster standard cassette tape and 63 minutes when recording on a PHDVM-63DM DigitalMaster mini cassette tape. The DVCAM format adopts a wider track pitch than the HDV/DV format (15 µm compared to 10 µm), and offers a maximum recording time of 184 minutes on a PDV-184N standard cassette tape and 40 minutes on a PDVM-40N mini cassette tape. Up-conversion Capability With the optional HVBK-1520 Format Converter Board installed, the HVR-1500A has an up-conversion capability that allows DV recordings and SD signals*4 fed to the HVR-1500A to be converted to 1080i or 720P signals and then output*5 from the HD-SDI interface. This allows DV recordings to be integrated into existing HD editing systems that support the 1080i or 720P format. When up-converting the DV recording, the aspect ratio displayed can be converted from 4:3 to 16:9. Display modes can be selected from Squeeze, Edge Crop, or Letterbox. *4 DV signals fed to the HVR-1500A's i.LINK™ interface cannot be up-converted and output from the HD-SDI interface. *5 There may be a delay of one frame in outputting up-converted signals from the HD-SDI interface. Cross-conversion Capability With the optional HVBK-1520 Format Converter Board installed, the HVR-1500A has a cross-conversion capability that allows 1080i recordings to be converted to 720P signals, as well as 720/30P (29.97 frames/s) recordings to be converted to 1080/60i (59.94 fields/s) signals. These signals are output*6 from the HD-SDI interface. This allows source footage and assets in different HDV formats to be integrated into the same HD editing system. *6 There may be a delay of one frame in outputting cross-converted signals from the HD-SDI interface. Down-conversion Capability The HVR-1500A has a built-in down-conversion capability that allows 1080i recordings to be output as 480i and 576i signals from the i.LINK and SD-SDI interfaces. These signals can also be output from the analog component, composite, or S-Video connectors. This allows 1080i recordings to be edited using nonlinear editing systems running DV editing software or to be viewed on an SD monitor. When down-converting the 1080i recording, the aspect ratio displayed can be converted from 16:9 to 4:3. Display modes can be selected from Squeeze, Letter box, or Edge crop. HDV 1080i (16:9) DVCAM/DV (4:3) Squeeze Letter box Edge crop 3