Opened 9 years ago

Closed 8 years ago

#907 closed defect (fixed)

Incorrect cMax for last_significant_coeff_x_suffix and last_significant_coeff_y_suffix

Reported by: peterderivaz Owned by: bbross
Priority: trivial Milestone:
Component: Text Version: D9 (K1003) v11
Keywords: Cc: bbross, wjhan, jct-vc@…

Description

Table 9-32 says that last_significant_coeff_x_suffix uses a binarization of "FL, cMax =(last_significant_coeff_x_prefix >> 1) − 1".

However, on page 92 is says:
"The values of last_significant_coeff_x_suffix shall be in the range from 0 to ( 1 << ( ( last_significant_coeff_x_prefix >> 1 ) − 1 ) ) − 1, inclusive."

I believe this means that the binarization used is actually:
"FL, cMax = ( 1 << ( ( last_significant_coeff_x_prefix >> 1 ) − 1 ) )".

Change History (4)

comment:1 Changed 9 years ago by DefaultCC Plugin

  • Cc bbross wjhan jct-vc@… added

comment:2 Changed 8 years ago by bbross

Actually cMax is supposed to be the maximum value of the syntax element which is:
( 1 << ( ( last_significant_coeff_x_prefix >> 1 ) − 1 ) ) − 1
here. This it should be:
cMax = ( 1 << ( ( last_significant_coeff_x_prefix >> 1 ) − 1 ) ) − 1

comment:3 Changed 8 years ago by peterderivaz

I agree - sorry for the confusion in the initial bug report.

comment:4 Changed 8 years ago by bbross

  • Resolution set to fixed
  • Status changed from new to closed

Fixed in JCTVC-L1003_v1.

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