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Frame Rate |
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NTSC inputs | 30 | 30 | 30 | 30 | 15 | 15 | 10 | 1 |
(30 or 60fps) |
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PAL inputs | 25 | 25 | 25 | 25 | 10 | 10 | 5 | 1 |
(25 or 50fps) |
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IDR | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 0 |
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Profile | Baseline | Baseline | Main | Main | Main | Main | Main | Main |
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y | y | y | y | y | y | y | y | |
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Rate Control | 60 | 60 | 60 | 60 | 60 | 60 | 60 | 15 |
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†In general, start in left column and read from left to right. †† Default template.
Template | This |
| applied using the Load Template button. If a template is applied it will |
| display Parameters Match or Parameters Do Not Match (depending on |
| whether or not changes have been made). Select Load Template > |
| None to clear a "parameters do not match" message. |
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Profile | Each profile targets a specific class of applications. The profile you |
| select must be supported by the decoder. For example, StreamPlayer |
| and QuickTime support both profiles. |
| • Baseline – Typically used for applications with limited computing |
| resources, for example video conferencing and mobile |
| applications. Maximum backwards compatibility and lower CPU |
| requirements for decoder. |
| • Main – Default. Originally intended for broadcast and storage |
| applications providing better quality and more efficient |
| bandwidth usage. |
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Resolution | Sets the video encoding resolution (the width and height respectively |
| of the video on a PC screen. See Table 5 below for all resolutions. |
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Target Bit Rate | |
(bits/sec) | This number, in 1000 bits/sec increments, represents how much data |
| the VBrick will send out each second to carry video to a player. The |
| word target is used because the appliance can vary its bit rate slightly |
| in response to the amount of detail in the movie or camera output. |
| The more data the appliance sends in one second, the more clearly |
| the details of the video will be seen on a player. It is not always |
| desirable to send the most possible data, since that requires a large |
| network "pipe" (connection). The |
| video with the use of smaller network connections. The encoder tries |
| to encode the video at a quality that will (on average) match the |
| Target Bit Rate. The larger the number, the better the quality but this can |
| potentially limit the number of clients that can connect to the encoder. |
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36 | © 2009 VBrick Systems, Inc. |