Re: [xrblock] Comments on draft-ietf-xrblock-rtcp-xr-concsec

Hi,Claire:
Thank for your comments to draft-ietf-xrblock-rtcp-xr-concsec.
Here is my reply inline below.

Regards!
-Qin
  ----- Original Message ----- 
  From: Claire Bi(jiayu) 
  To: xrblock 
  Sent: Saturday, October 13, 2012 4:02 PM
  Subject: [xrblock] Comments on draft-ietf-xrblock-rtcp-xr-concsec

  Hi， 

  Several quick comments to draft-ietf-xrblock-rtcp-xr-concsec: 

  1. Section 1.4 
  Editor Notes needed to be cleared. 

[Qin]: To clear the Editor Note, we need firstly reach agreement that
this draft should also need to support packet loss concealment for video application.

  2. Section 2.1 Report Block Structure 
  s/Loss Concealment metrics block/Concealed Seconds metrics block 

[Qin]: Good catch, thanks.

  3. Section 2.1 figure 1 
  s/BT =NLC/ BT =NCS 

[Qin]: Okay.
  4. Section 2.2 Unimpaired Seconds 
  There's no definition of VAD. I proposed we should add it in the text. 
  OLD TEXT： 
  " 
  ...if VAD is used, shall be counted as unimpaired seconds. 
  " 
  NEW TEXT: 
  " 
  ...if Voice Activity Detection (VAD) is used, shall be counted as unimpaired seconds. 
  " 
 [Qin]: How about not expand VAD, instead put a external reference to VAD which
explain what VAD is?
  5. Section 2.2 
  "Packet Loss Concealment Method (plc): 2 bits" 
  If video loss concealment techniques are suppoted, 2 bit packet loss conealment method is not 
  sufficient. 

[Qin]: Agree,probably we need to support addtional 4 or more video loss concealment method.
In that case, at least 4 bits is required.

  Claire 

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