Extron-electronics SME 100 User Guide Uživatelský manuál stáhnout pdf (Strana 96)

c Encoder Configuration panel

• Resolution — This drop-down menu is used to set the resolution of the video

being output (streamed) by the SME100. The table on page 34 of the "Encoder

Config Menu" section lists output resolutions that are supported by the SME100.

• Frame Rate — This drop-down menu is used to set the frame rate of the video

being output (streamed) by the SME100. The range of settings varies depending

on the media player plugin used to view streams. The default is 30 frames per

second.

• Stream Mode — This drop-down menu is used to set what is being output

(streamed) by the SME100. Two configuration options are available: Video / Audio

or Video Only. The default is Video / Audio.

• Stream Type — Three selection drop-down menus to select a bit rate scheme.

• VBR — The Variable Bit Rate (VBR) scheme continuously adjusts the bit rate

depending on image complexity. It uses more bandwidth when the video frame

is more complex and less bandwidth when the video frame is simple. Use the

Video Bit Rate field to set the base bit rate number.

• CVBR — The Constrained Variable Bit Rate (CVBR) scheme works the same

as VBR, but sets a maximum bit rate that cannot be exceeded. It doubles the

value specified in the Video Bit Rate field (so if the Video Bit Rate field

contains a value of 1000 kbps, the maximum allowed bit rate is set to 2000).

• CBR — The Constant Bit Rate (CBR) scheme adjusts the bit rate so that it

stays close to, but does not go over, the specified bit rate. This bit rate control

mode is the most aggressive of the three schemes. The bit rate is specified

using the Video Bit Rate field.

NOTES:

• If the speciﬁed bit rate is set higher than is required to output the

stream, CBR only uses the necessary bit rate required to output the

stream and does not attempt to stay close to the speciﬁed bit rate.

• If the output stream requires a higher bit rate to display the stream

properly (the speciﬁed bit rate is not set high enough), the quality of

the output stream will be adversely affected. This is because the CBR

scheme cannot adjust the bit rate higher than the speciﬁed bit rate.

• Closed Captioning — Drop-down menu used to enable or disable Closed

Captioning.

• Profile Type — Profile type and profile level are used to maintain compatibility

with connected decoders. This drop-down menu sets the compression level of the

H.264 stream from one of three choices:

• Baseline – Lowest compression level and less processor intensive to decode.

• Main – Midrate compression and performance.

• High – Higher compression levels and better quality for the selected bitrate but

more processor intensive to decode.

• Profile Level — This drop-down menu sets the upper limits of resolution, bitrate,

and frame size. Settings are from 3.0 (for lower limits) to 5.0 (for higher limits).

• Video Bit Rate — This field is used to specify the number of video bits that are

processed (output) per second. The range of settings is 200 to 10000.

Default is 1000.

• Audio Bit Rate — This field is used to specify the number of audio bits (in kilobits)

that are processed (output) per second. The range of settings is 16 to 384.

Default is 384.

SME100 • Web-based Configuration Page 90

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