Using the ARIB Di
splays
The decoded ancillary data includes the following:
DID - Data Identifier of the requested packet; permissible values range from 1 to 0xFF (255) inclusive.
Type - Type of the ANC Data packet. For ARIB TR-B.23-1, this is always a Type 2 packet (DID less than 0x80), as
defined by SMPTE
291M. The actual value (with parity bits added) is displayed in parentheses.
SDID - Secondar
y D ata Identifier of the requested packet; permissible values range from 0 through 0xFF (255) inclusive.
This field only appears when a Type 2 packet is selected (see above). The actual value (with parity bits added) is
displayed in parentheses.
DC - Data Count word of the acquired packet. The number of User Data words is displayed in decimal. The actual value
(with parity b
its added) is displayed in parenthesis, in hexadecimal.
Field - The fiel
d of the video from which the packet was acquired. For progressive formats, 1 is displayed.
Line - The line
of the video (within the field) from which the packet was acquired.
Stream - For HD
(SMPTE 292M), indicates whether the ancillary packet was acquired from the Y or C data streams.
For SD, N/A is displayed.
Status - Indicates whether packet(s) of the desired type are present in the video; also indicates Checksum or CRC errors.
Checksum - Indicates the checksum word that was recovered from the acquired packet.
Should be - Indicates the checksum work computed by the instrument, based on the packet’s data.
Format - Indicates the name of the ancillary data type or standard.
User Data Words - Contains the payload of the ancillary packet, displayed in hexadecimal. All 10 bits are displayed.
ARIB TR-B.23 (2) Display and Status Screens
The ARIB TR-B.23 (2) display shows the decoded data for video signals using ancillary data compliant with ARIB TR-B.23
(2). (See Figure 9.) When this display is s elected, the instr ument searches the signal for ARIB TR-B.23 (2) packets using
the DID/SDID combinations defined by ARIB.
Waveform Rasterizers Quick Start User Manual 81
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