Table 2 Test conditions used in the audio-only, video-only and audiovisual tests. CBR: constant bit rate, PLR: uniform packet loss rate, processing was done generating different loss traces; PLC: packet loss concealment.
Parameters | Video | Audio |
|---|---|---|
Video-/audio-only test | Â | Â |
Format | HD ( | wav (48 kHz, 16 bit, stereo) |
| Â | SD ( | Â |
Codec | H.264; MPEG2 | MPEG-2 AAC L |
| Â | Â | MPEG-4 HE-AACv |
CBR | H.264: | aac: |
| Â |
| heaac: |
| Â | MPEG2: | mp2: |
| Â |
| mp3: |
PLR |
|
|
| Â |
| codec-built-in (for details, see [19]) |
PLC | Freezin | Â |
Audiovisual test | Â | Â |
Format | HD ( | wav (48 kHz, 16 bit, stereo) |
| Â | SD ( | Â |
Codec | H.264 | MP2; AAC |
CBR |
| aac: 48 kbps |
| Â |
| mp2: |
PLR |
|
|
| Â |
| Â |
PLC | Freezing; slicing | codec-built-in (for details, see [19]) |
pixels)
pixels)
(aac); MPEG-1 LII (mp2)
(heaac); MPEG-1 LIII (mp3)
Mbps (HD)
kbps
Mbps (SD)
kbps
Mbps (HD)
kbps
Mbps (SD)
kbps
% (freezing)
% (frame loss 
1 frame per packet)
% (slicing)
; slicin
pixels)
pixels)
Mbps (HD)
Mbps (SD)
kbps
% (freezing)
% (frame loss 
1 frame per packet)
% (slicing)
AC: advanced audio coding; LC: low complexity.
E-AAC: high efficiency advanced audio coding.
n case of packet loss, the picture freezes until the next intact I-frame arrives; the frames in between are skipped in our case.
slice typically corresponds to a certain area of the image that—if affected by loss—the decoder fills with data from the same, previous, or following video frame.
AC: advanced audio coding; LC: low complexity.
E-AAC: high efficiency advanced audio coding.
n case of packet loss, the picture freezes until the next intact I-frame arrives; the frames in between are skipped in our case.
slice typically corresponds to a certain area of the image that—if affected by loss—the decoder fills with data from the same, previous, or following video frame.