[Mp4-tech] Query regarding postprocessing algorithm for MPEG 4

[Parag Chaurasia]

An HTML attachment was scrubbed...
URL: /pipermail/mp4-tech/attachments/20040106/6a2e4f9b/attachment.html
-------------- next part --------------
  Hi,
    In general, quantization parameter (of the macroblock to which pixel belongs) is used in various deblocking filter algorithms. So, quant_scale refers to the absolute quantization parameter value (which may change from macroblock to macroblock within a VOP).
  In MPEG-4 Video, quant_scale appears in video_packet_header() and indicates the absolute value of quantization parameter to be used for the macroblock. It's "default" length is 5 bits and so value ranges from 1 to 31. Please note that vop_quant appearing for each coded VOP in VideoObjectPlane() also specifies absolute value of quantization parameter (and so quant_scale in your algorithm may also refer to it!)
  Regards,
  Parag.
On Tue, 06 Jan 2024 Binuninan wrote :
>
>Hi All,
>
>We were in the processes of developing a deblocking filter for MPEG4 video
>receiver. We have obtained an algorithm wherein a value called Quant_scale
>(probably quantization scale) has been referred to in order to determine the
>existence of true or false edge. Can any of you give an idea as to what the
>value of Quant_scale will be??
>Anticipating an early reply,
>
>Thanking you,
>
>With Regards
>
>Binu Ninan
>_______________________________________________
>Mp4-tech mailing list
>Mp4-tech lists.mpegif.org
>http://lists.mpegif.org/mailman/listinfo/mp4-tech
>
>Note: Conduct on the mailing list is subject to the Antitrust guidelines found at http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php