Correction to VP9 Tile Info Semantics

[peter....@argondesign.com]

The VP9 specification says in the semantics for tile info 7.2.11:

tile_cols_log2 specifies the base 2 logarithm of the width of each tile

tile_rows_log2 specifies the base 2 logarithm of the height of each tile

I believe these should read:

tile_cols_log2 specifies the base 2 logarithm of the number of tiles across the frame

tile_rows_log2 specifies the base 2 logarithm of the number of tiles down the frame

Peter de Rivaz

[Yunqing Wang]

Hi Peter,

I looked at the spec. I think you are right. That section should be something like:

7.2.11 Tile info semantics

increment_tile_cols_log2 indicates whether the number of column tiles should be increased.

tile_cols_log2 specifies the base 2 logarithm of the number of column tiles used in the frame.

It is a requirement of bitstream conformance that tile_cols_log2 is less than or equal to 6.

increment_tile_rows_log2 indicates whether the number of row tiles should be increased.

tile_rows_log2 specifies the base 2 logarithm of the number of row tiles used in the frame.

Yunqing

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[Adrian Grange]

Hi Peter,

I will update the document accordingly. Thanks for letting us know.

Best regards,
Adrian