Aurora Design SC User And Technical Manual

Standards converter for mechanical television

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Standards Converter

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Mechanical Television

Model's SC

User and Technical

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Page 1 Standards Converter Mechanical Television Model’s SC User and Technical Manual...
Page 2 Copyright 2006-9 Aurora Design LLC. Revision 1.0 23 April, 2007 All specifications subject to change www.tech-retro.com...
Page 3 Introduction Introduction This manual covers the operation and technical aspects of the Single-Standard Converter for mechanical television. The Converter is designed to accept an NTSC or PAL/SECAM video signal and convert to one of several different output standards depending on the model. The converted video is sent to a composite video output connector.
Page 4: Front Panel
Introduction Front Panel The front panel is shown below: Composite Video Input Status Composite Video Input: The Composite video input signal required depends on the operating mode and model of the converter. A video source conforming to the NTSC or PAL/SECAM video standards must be supplied to the Composite (RCA or BNC) input connector.
Page 5: Rear Panel
Introduction Rear Panel The rear panel is shown below: Composite 9Vdc Video Input Output Composite Video Output: This RCA or BNC connector provides the video output from the converter. This output should terminate into a 75 ohm load. For complete information about the characteristics of this output, please refer to the Specifications section found later in this manual.
Page 6 Introduction Back of unit (Outputs) Option Switch Programing Port Front of unit (Inputs / LED) The internal Option Switch S1 has four controls allowing the user to set the operating mode of the converter. In order to change the switch settings, the cover must be removed from the unit.
Page 7: Operating Modes
Introduction Position 2 - Output Standard Select: This switch is used to control the Output Standard of the converter. For the SC30/32 model, in the OFF position a 32/12.5p NBTV type signal is output. This includes the appropriate line and frame sync signals. In the ON position a 30/12.5p Baird type signal is output.
Page 8: Typical Connections
Introduction entered whenever the video input is not present for more than 1 hour. With this feature, the standards converter is shut down, along with the video output. Only the video decoder is left active to signal when a valid video input is again supplied to the unit to wake it up.
Page 9: Theory Of Operation
Introduction Theory of Operation In order to convert between different video standards, spatial and temporal correction are required. Spatial correction involves changing the resolution, size and aspect ratio of the incoming video to the output video format. This can be easily achieved through standard digital methods utilizing scalers and FIR filters.
Page 10 Introduction The incoming video is digitized and processed by the TVP5150A using a 14.318MHz reference crystal to the ITU-601 (formerly known as CCIR601) specification. All internal timing is generated using this crystal. The video is quantized, processed for brightness, contrast, chroma gain and hue, among others, and output at the ITU rate of 27MHz on an 8 bit, time multiplexed bus, with alternating luma and chroma samples.
Page 11: Updating Firmware
Introduction created in the FPGA to generate all timing signals for the model’s output standard. All horizontal, vertical, pixel count and line count generation is done in this process. This is the main “heartbeat” process for the entire design. Using these timing signals, the video data that was stored in the field memory synchronous to the incoming ITU video clock can now be clocked out.
Page 12: Specifications
Specifications Specifications Video Input: Supported Standards: NTSC 29.97fps / PAL 25fps / SECAM 25fps Video Quantization: 9bit A/D, 8 bit data Video Input: Composite - 1Vpp, 75 ohm impedance Video Output: Video Output: Composite - 1Vpp into 75 ohms Video Quantization: 10 bit Effective D/A Video Levels: +/- 3% of output standard...
Page 13 Supported Conversions Supported Conversions NTSC/PAL to 32/12.5p NBTV: Image / Pixel Aspect Ratios: 2:3 / 0.33 Pixel Clock: 27.0 MHz Active Pixels / Lines: 32 (cropped 60) / 120 - NTSC Input 32 (cropped 60) / 125 - PAL Input Horizontal / Vertical Frequency: 12.488 Hz / 400 Hz - NTSC Input 12.5 Hz / 400 Hz - PAL Input Scan Type:...
Page 14: Available Models
Available Models Available Models Model No. SC30/32 NTSC/PAL to 30/12.5p Baird and 32/12.5p NBTV...
Page 15: Firmware Revision History
Firmware Revision History Firmware Revision History Revision 1.0, April 23, 2007: 1) Initial release. Note: Hardware/Firmware revision level can be found on bottom label of unit.