[Mp4-tech] [Audio-Tech] BSAC Decoder: PNS Conformance issues

[KumarBraj Bhushan]

Hi,
I have few queries regarding PNS feature in MPEG4 BSAC Decoder:
1) Recently few test cases er_bs07*.mp4 have been added for PNS conformance testing purpose in ftp.iis.fhg.de/mpaudconf. But it is observed that in the periodic testing result at ftp.tnt.uni-hannover.de/autoconftest , results corresponding to these particular test vectors are not mentioned. We have found that only 32, 44.1 and 48 kHz test streams pass the full conformance criteria whereas others fail for few bands with reference ISO source code. Any observation/explanation by the experts will be very helpful.
2) There are few test streams (created for Korean DMB-T) obtained from our customers, which generate high frequency glitches. Most of the time amplitude is high. We have checked all the source related to BSAC in the latest release REFSOFT_MPEG4NA_20050109 (from ftp.tnt.uni-hannover.de/incoming/cvs) but donot find any update. This may be problem with the Encoder or the Decoder in following the ISO specifications. Has there been any change in the specifications recently? Have other developers come across the similar problem ever?
Please reply as soon as possible. Thanks in advance.
regards,
-Kumar.