Specifications
Specifications in this chapter:
AC power specification
The K2 Media Client AC power specification is shown in the following table.
Characteristic Specification Power supply Dual, redundant Mains Input Voltage 100V to 240V auto-range, 50-60Hz Power consumption 300W typical, 500W maximum
WARNING: Always use a grounded outlet to supply power to the system. Always use a power cable with a grounded plug, such as the one supplied with the system.Environmental specifications
Mechanical specifications
Dimension Measurement Height 7 in (177 mm) Width 17.75 in (450 mm) Depth1 25.75 in (654 mm) Weight: 69.5 lbs (31.5 kg) maximum
1Adjustable rack-mounting ears accommodate different rack depth limitations.Electrical specifications
The following sections describe the electrical specifications:
Serial Digital Video (SDI)
Genlock Reference
System Timing
Characteristic Description1 Encoder timing Derived from the video input Nominal Playback Output Delay Adjustable(Default: Zero timed to reference genlock) SD Output Delay Range(Independent for each play channel) 525 linesFrames: 0 to +1Lines: 0 to +524Samples: 0 to +1715 clock samples 625 linesFrames: 0 to +3Lines: 0 to +624Samples: 0 to +1727 clock samples HD Output Delay Range(Independent for each play channel) 1080i at 29.97 FPS (SMPTE 274M-5)Frames: 0 to +1Lines: 0 to +1124Pixels: 0 to +2199 720p at 59.94 FPS (SMPTE 296M-2)Frames: 0 to +1Lines: 0 to +749Pixels: 0 to +1649 1080i at 25 FPS (SMPTE 274M-6)Frames: 0 to +1Lines: 0 to +1124Pixels: 0 to +2639 720p at 50 FPS (SMPTE 296M-3)Frames: 0 to +1Lines: 0 to +749Pixels: 0 to +1979 Loop through On SD-only models, the video, AES, and LTC inputs pass to the their output connectors as loop through. This is on record channels only. On HD/SD models there is no loop through of any type E-to-E video Not supported
1All delay values shown are relative to Black Reference.AES/EBU Digital Audio
LTC Input/Output
VITC Input/Output
RS-422 specification
The RS-422 interface conforms to ANSI/SMPTE 207M-1997 standard (SMPTE 422).
GPI I/O specifications
Operational specifications
Topics include:
Video codec description – SD-only models
Format Sampling Frame Rate Data Rate Other DVCPRO25 (720X480/576) 4:1:1 29.97, 25 3.6 MBps — DVCPRO501 (720X487.5/585) 4:2:2 29.97, 25 7.2 MBps — DVCAM (720X480/576) 4:1:1/4:2:0 29.97, 25 3.6 MBps — MPEG-2 (720X480/576) 4:2:0 29.97, 25 2-15 Mbps I-frame and long GoP MPEG-2 (720X480/576) 4:2:2 29.97, 25 4-50 Mbps I-frame and long GoP MPEG-2 (720X512/608) 4:2:2 29.97, 25 4-50 Mbps I-frame and long GoP D10/IMXa (720X512/608) 4:2:2 29.97, 25 30, 40, 50 Mbps I-frame only
1DVCPRO50 / D10/IMX operation is a licensable option.Video codec description – HD/SD models
Format Sampling Frame Rate Data Rate GoP SD formats MPEG-2 (720X480/576) 4:2:0 29.97, 25 2-15 Mbps I-frame and long GoP MPEG-2 (720X480/576) 4:2:2 29.97, 25 4-50 Mbps I-frame and long GoP MPEG-2 (720X512/608) 4:2:2 29.97, 25 4-50 Mbps I-frame and long GoP HD formats1 MPEG-2 (1920x1080) 4:2:0 29.97, 25 20-80 Mbps I-frame and long GoP2 MPEG-2 (1920x1080) 4:2:2 29.97, 25 20-100 Mbps I-frame and long GoP MPEG-2 (1280x720) 4:2:0 59.94, 50 12-80 Mbps I-frame and long GoP MPEG-2 (1280x720) 4:2:2 59.94, 50 20-100 Mbps I-frame and long GoP
1Low bitrate I-frame encoding is not recommended2Decode of lower bit rate is possiblePlayout of multiple formats
The K2 Media Client automatically handles material of various types and formats as specified in the following sections:
Playout on SD-only models
On SD-only models, for a given frame rate, you can play clips of any format back-to-back on the same timeline. Refer to table Video codec description – SD-only models earlier in this chapter for a list of the supported formats.
On SD-only models, both 16:9 and 4:3 resolution formats can be played on the same timeline. Refer to Aspect ratio conversions.
Both SD-only and HD/SD models support mixed clips with uncompressed and compressed (Dolby-E) audio on the same timeline. (requires external Dolby-E decoder).
Refer to VBI/Ancillary data specifications for specifications on how SD-only models handle VBI data and ancillary data.
Playout on HD/SD models
On HD/SD models, for similar frame rates (25/50 fps or 29.97/59.95 fps), MPEG SD material transferred or recorded into the K2 Media Client along with its audio is up-converted when played on a HD output channel. Likewise, HD material is down-converted along with its audio when played on SD output channel. HD and SD clips can be played back-to-back on the same timeline, and aspect ratio conversion is user configurable. Refer to Aspect ratio conversions. Refer to the following tables for specifications on SD and HD conversions.
Refer to VBI/Ancillary data specifications for specifications on how HD/SD models handle VBI data.
25/50 fps conversions on HD/SD models
29.97/59.95 fps conversions on HD/SD models
Aspect ratio conversions
VBI/Ancillary data specifications
The K2 Media Client supports SD Vertical Blanking Interval (VBI) data and HD Ancillary (Anc) data as specified in the following sections:
VBI data support on SD-only models
Video format Compressed VBI Uncompressed VBI Closed Captioning Comments DVCPRO25525 line (NTSC) Not supported Not supported by DVCPRO25 format Supported, as native to DVCPRO25. VCHIP data supported. — DVCPRO25625 line (PAL) Not supported Not supported by DVCPRO25 format Not supported.Teletext not supported DVCPRO50525 line (NTSC) Supported Not supported by DVCPRO50 format Supported, as native to DVCPRO50 (compressed VBI). VCHIP data supported. DVCPRO50 is a licensable option. DVCPRO50625 line (PAL) Supported Not supported by DVCPRO50 format Closed Captioning not supported.
Teletext supported, as native to DVCPRO50 (compressed VBI). DVCAM525 line (NTSC) Not supported Not supported by DVCAM format Supported, as native to DVCAM. — DVCAM625 line (PAL) Not supported Not supported by DVCAM format Closed captioning and teletext supported, as native to DVCAM. — MPEG-2525 line (NTSC) Supported as 16 lines per field.
Range: 7–22 Supported. Six lines per field. User selectable. Range: 10–22Selected lines are saved in MPEG user data space and restored on playout. Supported and always on. Not selectable. — MPEG-2625 line (PAL)
Supported as 16 selectable lines per field.
Range: 7–22 Supported. Six lines per field. User selectable. Range: 6–22Selected lines are saved in MPEG user data space and restored on playout. Teletext not supported1 — MPEG-D10525 line (NTSC) Supported Not supported by D10 format. Supported, as native to D10. — MPEG-D10625 line (PAL)
Supported Not supported by D10 format. Closed captioning and teletext supported, as native to D10. —
1For 625/PAL, CC user data is disabled, so the only way to get Teletext is by either using Uncompressed VBI Line 21 (if an MPEG format), or Compressed VBI for the 625/PAL formats.Only Luma VBI/Closed-captioning data is saved/encoded. Chroma VBI/Closed-captioning data is ignored on playback.
Ancillary data is not supported on SD-only models, except as data bridging when material is transferred to or from a HD/SD model. Refer to Data bridging of native material on HD/SD models.
VBI data support on HD/SD models
Video format Compressed VBI Uncompressed VBI Closed Captioning Comments SD
MPEG-2525 line (NTSC) Supported for record. Not supported for playback. Supported as six selectable lines per field. Range: 10–22Selected lines are saved in MPEG user data space and restored on playout. Supported and always on. Not selectable. — SD
MPEG-2625 line (PAL) Supported for record. Not supported for playback. Supported as six selectable lines per field. Range: 6–22Selected lines are saved in MPEG user data space and restored on playout. Teletext not supported1 —
1To pass through PAL MPEG-2 Teletext to playout, record it on VBI line 21, compressed or uncompressed.Only Luma VBI/Closed-captioning data is saved/encoded. Chroma VBI/Closed-captioning data is ignored on playback.
Ancillary data support on HD/SD models
Luma ancillary data packets are stored. Chroma ancillary data packets are not supported. Both VANC and HANC packets are stored if they are luma packets.
Data bridging of native material on HD/SD models
When MPEG-2 material that was recorded on a HD/SD model is converted on a HD/SD model, data is bridged as follows:
Source format Source
data Conversion Converted format Converted
data SD525 line Closed-captioning (CC) on line 21 (EIA-608) can be stored as UserData CC packets1 or UserData VBI Line21 (Uncompressed VBI Line21) Up-convert HD Ancillary Closed Caption EIA-708-B packets SD
625 line Teletext on line 21 No up conversion to HD SD
625 line
525 line Ancillary data No up conversion to HD HD EIA-708 & 608 Ancillary data packets Down-convert SD Closed-captioning on line 21 (EIA-608 standard). HD Teletext No down conversion to SD HD
1080i Ancillary data Cross-convert HD
720p Moved to valid lines HD
720p Ancillary data Cross-convert HD
1080i Moved to valid lines. Any data on lines 21-25 is moved to line 20 on 1080i output.
1UserData CC packets always on. If CC exists, it is recorded and played back.HD/SD models data compatibility with PVS models
When material is transferred between a PVS Profile XP Media Platform and a K2 Media Client, SD VBI data and HD Ancillary data is supported as follows:
Internationalization
When you enable internationalization on a K2 Media Client, you can name your media assets in a local language. The K2 Media Client supports the local language name as specified in the following table:
Video network performance
The K2 Media Client supports streaming transfers to and from K2 Media Clients, M-Series iVDRs, Profile XP Media Platforms, or any device that supports General Exchange Format (GXF) as described in SMPTE 360M.
Supported file input/output formats
The K2 Media Client can send and receive files of various formats using import, export, and transfer mechanisms.
Formats supported are as follows:
Media file system performance
Protocols supported
The following protocols are supported for remote control of the K2 Media Client:
Transfer compatibility considerations
When transferring material between a K2 Media Client and other Grass Valley products, you must consider the specifications of the different products. The following table illustrates some of these considerations:
Control point PC system requirements
If you are building your own control point PC, the machine you chose must meet the following requirements. These requirements assume that the PC is dedicated to its function as the control point for the K2 Media Client and that no other applications run on the PC that could interfere with system performance.
Control point PC system requirements are as follows:
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