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This standard has been developed to carry HDTV digital video signals and formatted data within the defined payload areas including ancillary data. The standard can carry 1280×720, 1920×1080 or 2048×1080 active pixel formats through the 1.5 Gb/s Serial Digital Interface and enables the carriage of any ancillary data conforming to SMPTE ST 291.
This document defines the supplementary usage rules for Ancillary data spaces on an interconnecting interface compliant with SMPTE ST 291-1. The ancillary data space located during the horizontal interval of every video line (between EAV and SAV) is called horizontal ancillary data space (HANC).
Like SMPTE 259, SMPTE 292 supports the SMPTE 291 standard for ancillary data. Ancillary data is provided as a standardized transport for non-video payload within a serial digital signal; it is used for things such as embedded audio , closed captions , timecode , and other sorts of metadata .
- Synchronization Packets
- Line Counter and CRC
- Ancillary Data
- Video Payload
- Emmy Award
A synchronization packet occurs immediately before the first active sample on every line, and immediately after the last active sample (and before the start of the horizontal blanking region). The synchronization packet consists of four 10-bit words. The first three words are always the same—0x3FF, 0, 0; the fourth consists of 3 flag bits, along wi...
To provide additional robustness, the four samples immediately following the EAV packets (but not the SAV packets) contain a cyclic redundancy check field, and a line count indicator. The CRC field provides a CRC of the preceding line (CRCs are computed independently for the Y and C streams), and can be used to detect bit errors in the interface. T...
Like SMPTE 259, SMPTE 292 supports the SMPTE 291 standard for ancillary data. Ancillary data is provided as a standardized transport for non-video payload within a serial digital signal; it is used for things such as embedded audio, closed captions, timecode, and other sorts of metadata. Ancillary data is indicated by a 3-word packet consisting of ...
Within the active portion of the video, the data words correspond to signal levels of the respective video components. The luminance (Y) channel is defined such that a signal level of 0 mV is assigned the codeword 64 (40 hex), and 700 millivolts (full scale) is assigned the codeword 940 (3AC) . For the chroma channels, 0 mV is assigned the code wor...
On July 31, 2013 it was announced that SMPTE won a Technology & Engineering Emmy Award for 2013 by the National Academy of Television Arts and Sciences. The honor recognized the society’s work on development, standardization, and productization of SMPTE 292.
Ancillary data (commonly abbreviated as ANC data), in the context of television systems, refers to a means which by non-video information (such as audio, other forms of essence, and metadata) may be embedded within the serial digital interface. Ancillary data is standardized by SMPTE as SMPTE 291M: Ancillary Data Packet and Space Formatting.
Aug 29, 2013 · code data formatted according to SMPTE ST 12M-1 in 8-, 10-, or 12-bit digital television data interfaces. Time code information is transmitted in the ancillary data space as defined in SMPTE ST 291M-1.
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Feb 7, 2008 · This standard is a transport defining a bit-serial data structure for 1.5 Gb/s [nominal] component signals, SDTV signals mapped into the SMPTE 292 payload, and formatted packetized data.
