Cobalt-digital COMPASS 9223 Dual-Channel 3G_HD_SD MPEG-4 Encoder Manuel d'utilisateur Page 26
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26 9223-OM (V2.0)
o HD 1080i inputs can be scaled to ¼ resolution (960×540), with the same
incoming frame rate
o SD inputs can be horizontally cropped to 704 pixels or horizontally scaled to 640
pixels
If Video Input Settings is set to Auto Detected, the following options are offered in this
parameter:
o Same as Input: the encoder will produce a signal that has the same resolution and
frame rate as the input (no scaling).
o Scale 3/4 Horizontal: the encoder will scale down the image horizontally by 3/4.
The frame rate will not be changed.
o Scale to 640×360p: the encoder will scale the input video to 640×360. The frame
rate will be the same as the input, but interlaced inputs will be de-interlaced (for
example, 1920×1080i60 will yield 640×360p30). This resolution is not available
for 1920×1080p inputs at any frame rates; the encoder will fall back to 3/4
horizontal scaling in this case.
o Scale to 480×270p, Scale to 320×240p, Scale to 320×180p: the encoder will
scale the input video to the selected resolutions. Interlaced inputs will be de-
interlaced as described above. Progressive inputs will be encoded at half frame
rate. This resolution is not available for 1920×1080p inputs at any frame rates;
the encoder will fall back to 3/4 horizontal scaling in this case.
• Video Rate Mode: This controls whether the video elementary stream is CBR or VBR.
The video bit rate setting varies according to this selection, as shown below.
• Bit Rate Selection: This field is shown only if the encoder is set to CBR mode, and
allows the user to specify either the video bit rate, or the transport bit rate. The transport
bit rate includes audio, video, tables, NULL packets, and various overheads. In some
situations, such as for example, RF links of fixed capacity, it is more convenient to
specify the transport rate (i.e., the final bit rate “in the wire”), and let the encoder
compute the corresponding video bit rate to yield the desired transport rate. In other
situations, such as IPTV deployments, it is more convenient to simply specify the video
bit rate and let the encoder compute the final transport rate. Note that this control is not
available in the OTT protocol modes. The controls displayed vary according to this
selection:
- Product Manual 1
- Version 2.0 1
- 2 9223-OM (V2.0) 2
- Copyright 2
- Trademarks 2
- Symbol Meanings 3
- Important Safety Instructions 3
- 4 9223-OM (V2.0) 4
- Environmental Information 4
- Contents 5
- Introduction 7
- Indicators and Switches 9
- Front Indicators 10
- Top Corner 11
- Default IP 12
- 9223 Operation and Management 13
- 14 9223-OM (V2.0) 14
- Product Tab 15
- Configuration Tabs 16
- Network Configuration DNS Tab 17
- Network Statistics Tab 18
- Encoder 1, Encoder 2 Tabs 19
- Video Input Auto-Detection 20
- Multiple Audio Support 20
- Closed Captioning 35
- Active Format Description 36
- Composite 37
- Analog Audio Parameters 38
- A/V Sync Adjustment 38
- PMT Information 38
- AAC-LC Configuration 39
- MPEG-1 Layer II Configuration 39
- Advanced Tab – Mux Parameters 41
- Encoder Connections Tab 43
- ASI/IP Streaming 44
- HTTP Live Streaming 44
- HLS Implementation Notes 48
- Direct HTTP Streaming 49
- The Apply/Cancel Buttons 52
- Encoder Statistics Tab 53
- Indicators 58
- ASI Outputs Tab 61
- ASI Output 62
- Parameters 62
- Input Selection 62
- Connection 62
- ASI Ports: Statistics Tab 63
- IP Outputs Tab 65
- IP Output 66
- Advanced 68
- Active IP Outputs Table 71
- IP Outputs: Statistics Tab 72
- Source Selection 74
- Destination Selection 75
- Connection Statistics Tab 78
- MPTS Configuration Tab 79
- MPTS Configuration Parameters 80
- MPTS PID/Program Allocation 80
- MPTS Statistics Tab 81
- Admin Tab 82
- Admin Firmware Tab 83
- Admin Config Files Tab 85
- User-Saved Configurations 86
- Pre-defined Templates 87
- Admin License Keys Tab 90
- Admin Event Log Tab 91
- Select This 92
- Configure 92
- Playing Video on a Web Page 95
- Web Pages Served by the 9223 96
- Multicast Streaming 97
- Web Browser Support 99
- 9223-OM (V2.0) 100
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