Specifications

Video Decoder and Display Settings

This section outlines settings available on the video receiving side, including decoding, post-

processing, and rendering (display). The settings for streaming states are the same as they are for the

encoder. (See Initial Streaming and Current Streaming States on page 8.)

Deblocking Filter

The deblocking filter attempts to reduce the blocky artifacts present at the edge of blocks (8 x 8

pixels) and created by the DCT/Quantization compression process in the encoder.

On a Nextiva S1970e-R, the deblocking filter can be enabled or disabled, but internally, the level of

deblocking dynamically adjusts itself in relation to the resolution, compression ratio, and decoding

time.

For the SDK decoder library or Microsoft Direct Show filters, it is possible to adjust the Deblocking

Filter to a different level.

De-Interlacing Mode

De-Interlacing Mode determines how interlaced video will be managed before it is rendered. The

setting can be enabled or disabled. Typically, if it is enabled, the unit will apply a de-interlacing filter

prior to rendering the frame. However, with an S1970e-R, if De-Interlacing Mode is enabled and the

incoming video is compressed at 30 or 25 fps, it will not be de-interlaced. In such cases, the video will

be displayed as is. If at some point video is sent at 15 fps or lower, de-interlacing will be applied. For

this reason, it is preferable to always enable this setting.

Wait for I-Frame

This means an I-Frame will be decoded before any frame from a new IP video stream is displayed.

This will prevent you from seeing incomplete video frames.

Delay Adjustment

This setting is used to adjust the number of extra buffered frames allowed between the decoder and

the renderer. The lower it is, the less delay in the complete setup. The higher it is, the smaller are the

chances for a skipped frame effect created by the rendering process. Currently, on an S1970e-R, the

Delay Adjustment can be set between 0 and 2.

Receiver Mode

This applies only to the S1970e-R, and it establishes the way the receiver works, whether in [0]=Solo

(Single View), [1]=Quad View, or [2]=Guard Tour. The unit needs to be rebooted whenever this mode

is changed from Solo to Quad or Solo to Guard Tour, and vice versa.