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7925-3
MODULE OVERVIEW
The 7925 module is a two-channel, dual downconverter with HD and SD outputs that can
be used in the most demanding broadcast applications. With two downconverters on one
module, the 7925 provides high efficiency with excellent picture quality. The downconverted
outputs are timeable with respect to the reference input and can feed production switchers
and routers.
The 7925 accepts 720p, 1080i, 1080sF and 1080p inputs that are synchronous or
asynchronous. If an SD SDI input is received, SD is passed to the output.
Motion-adaptive deinterlacing of the video signal enables all internal processing to occur in
progressive.
The 7925 performs automatic color space and gamma conversion to accommodate the
differences between HD and SD. The Aspect Ratio Conversion process offers resizing and
repositioning with choices for: Letterbox, Anamorphic, Crop and Zoom.
Proc amp controls are provided in the form of Video, Chroma and Pedestal. Video outputs can
be timed with respect to the reference input.
Audio Handling
The 7925 supports 16 channels of embedded audio (without the need for any sub module).
Embedded audio in the input is safely bypassed around the video processing, delayed to
preserve lip sync, and reembedded in the SD SDI output. Any two of those audio channels
can be selected for conversion to analog form. These balanced outputs can be used with
the composite video output to feed analog equipment, or for signal monitoring. All audio
processing and conversion is performed at full 24 bit resolution.
Control
The 7925 can be configured locally or controlled and configured remotely with Avenue Touch
Screens, Express Panels, or Avenue PC Software. Alarm generation, configurable user levels,
module lock-out, and customizable menus are just some of the tools included in the Avenue
control system.
Metadata
HD closed captioning is carried in data packets in the vertical interval ancillary data space. The
7925 properly translates HD caption data to traditional SD captioning (line 21 or 23) so that
closed captioning content is converted transparently between video standards and formats.
Automatic Aspect Ratio Conversion
The 7925 uses WSS (Wide Screen Signaling) and AFD (Active Format Description) to mark or
identify the aspect ratio of the video content. These tags are read at the input of the module
to determine the type of Aspect Ratio Conversion to perform. Subsequently, these tags are
properly updated in the output signal to reflect its format and presentation.
Model 7925 Dual HD Downconverter