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ippStsAacTnsDirectErr
TNS direction controls whether the filter is applied forward or backward over the spectral region. The value must be a legal syntax flag for the current TNS filter.
If this status appears, focus on the filter header and bit alignment. A direction error can be a symptom of an earlier wrong filter count or length that caused the parser to read the wrong bit as the direction flag.
Check together
- Filter count, length, and order for the same window.
- The direction bit and coefficient payload following it.
- Whether the current window sequence changes the number of TNS windows.
Intel IPP Error Reporting · FFmpeg TNS decoder · ISO/IEC 14496-3 AAC standard entry
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