Constrain the two pseudo-random number generators so that they are identical and also deterministic.
Werner Oomen, Philips, asked whether a random value is re-used, which might result in unexpected results due to correlation. The presenter confirmed that in the proposed implementation, random values are never re-used so that there are no correlation issues.
Constrain the values of bs_var_len to the values of 1, 2, 3. The higher values were never used in CE work or the Verification Test since the structure of SBR never requires a look-ahead of greater than 3 slots.
Reset of post-filter gain. This should be done when there is an SBR reset and the proposed correction makes this occur. This functionality is supported in MPEG-4 SBR.
Werner Oomen, Philips, asked whether this should be removed. Heiko Purnhagen, Dolby, noted that it is in SBR and it would not be advisable to change long-standing technology.
Change the HF generation module in the reference code so that it is aligned with the text description.
