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GS2970A Datasheet(PDF) 73 Page - Semtech Corporation |
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GS2970A Datasheet(HTML) 73 Page - Semtech Corporation |
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73 / 150 page  GS2970A 3Gb/s, HD, SD SDI Receiver Data Sheet 54244 - 2 September 2012 73 of 150 6. Ancillary data checksum error correction and insertion. 7. Audio extraction. 8. SMPTE 372M (Level B to Level A) Conversion. All of the above features are only available in SMPTE mode (SMPTE_BYPASS = HIGH). To enable these features, the IOPROC_EN/DIS pin must be set HIGH, and the individual feature must be enabled via bits in the IOPROC_DISABLE register. The IOPROC_DISABLE register contains one bit for each processing feature allowing each one to be enabled/disabled individually. By default (at power up or after system reset), all of the IOPROC_DISABLE register bits are LOW, enabling all of the processing features. To disable an individual processing feature, set the corresponding IOPROC_DISABLE bit HIGH in the IOPROC_DISABLE register. 4.18.1 TRS Correction & Insertion When TRS Error Correction and Insertion is enabled, the GS2970A generates and overwrites TRS code words as required. TRS Word Generation and Insertion is performed using the timing generated by the Timing Signal Generator, providing an element of noise immunity over using just the received TRS information. This feature is enabled when the IOPROC_EN/DIS pin is HIGH and the TRS_INS_DISABLE bit in the IOPROC_DISABLE register is set LOW. NOTE: Inserted TRS code words are always 10-bit compliant, irrespective of the bit depth of the incoming video stream. Table 4-15:IOPROC_DISABLE Register Bits Processing Feature IOPROC_DISABLE Register Bit TRS error correction and insertion TRS_INS Y and C line based CRC error correction CRC_INS Y and C line number error correction LNUM_INS Ancillary data check sum correction ANC_CHECKSUM_INSERTION EDH CRC error correction EDH_CRC_INS Illegal code re-mapping ILLEGAL_WORD_REMAP H timing signal configuration H_CONFIG Update EDH Flags EDH_FLAG_UPDATE Audio Data Extraction AUDIO_SEL Ancillary Data Extraction ANC_DATA_EXT Audio Extraction AUD_EXT Regeneration of 352M packets REGEN_352M |
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