7920 HD Downconverter

• Downconverter
• Proc Amp and Frame Sync
• 16 bit processing
• Accepts asynchronous signals
• Automatically adjusts between SD/HD color space and gamma
• Picture Detail Enhancement
• Anti-Alias Filter
• Passes closed captioning
• Auto detection of input standard and frame rate
• 3:2 pulldown
• Built in test pattern and tone
• Local and remote control
• Audio Tracking Delay optional
• Audio Mux/Demux optional
• Occupies one slot in frame, even with audio option

The 7920 module has an HD SDI input and four outputs that can be configured as two SDI and two composite outputs, or four SDI outputs. Whether it’s providing digital feeds to production switchers and routers or analog monitoring, the 7920 is right at home.

The Downconversion process includes Picture Detail Enhancement and Anti-Alias Filtering, which makes for a pristine SD output. The Aspect Ratio Conversion process offers Resizing and Repositioning with choices for: Letterbox, Anamorphic, Crop and Zoom. The 7920 automatically adjusts from HD to SD color space and gamma. Proc amp controls are provided in the form of Video, Chroma and Pedestal. A special Mirror Output Mode can be enabled, causing the output image to be flipped left to right for use with on-camera talent.

The 7920 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.

Meta Data

HD closed captioning is carried in data packets in the vertical interval ancillary data space. The 7920 properly translates between HD caption data and 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 7920 supports WSS (Wide Screen Signaling), and AFD (Active Format Description) to mark or identify the aspect ratio of the video content. These flags are generated at the output of the module, and they are read at the input. This allows the up and down conversion process to adapt automatically to material that is already in letterbox or pillarbox form in order to produce the most appropriate conversion.

Audio Options

When an audio sub module is installed, audio is automatically delayed as needed to compensate for the video processing in the 7920. For complete audio processing, choose from three different audio sub modules. Sub modules plug onto the 7920 board and do not take up a slot in the frame.

The 8415 is an eight channel audio sub module with AES I/O that provides management of embedded audio in the processing path, or supports audio embedding/disembedding alongside the video processing elements. Embedded audio is safely bypassed around the video frame store with the lip sync preserved. Level adjustments and channel shuffling are accessed through the built-in audio mixer. All audio processing is performed at full 24 bit resolution by a digital signal processor (DSP).

The 7610 provides carriage of up to eight channels of embedded audio through the format conversion process. Embedded audio in the input signal is delayed to match the video delay and preserve lip sync. The delayed content is reinserted in the video output. No level adjustment or channel swapping is provided.

The 7615 also provides processing for signals with eight channels of embedded audio. It offers the same processing and AES I/O as the 8415 plus the ability to decode Dolby-E signals.