H.263_2000 Codec
- Kelli Higdon
Once the codec is selected in the Video Profile object the individual supported parameters of that codec can be configured. These parameters will be displayed in the SDP that is offered when negotiating the codec of a video call. Â Below are the parameters within the H.263_2000 Codec that are supported on the IMG 2020. Use the H.263_2000 Codec object to configure each of the parameters. Refer to RFC 4629 and RFC 3555 for more information on the scheme to packetize an H.263 stream along with its SDP parameters needed to support the codec.
The H.263_2000 Codec is also referred to by H.263++.
Web GUI Page
Dialogic > Profiles > IP Profiles > IP Profile > Video Profile (H.263) > New H263_2000 Codec
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Maximum Objects
One H.264 codec object can be created under each Video Profile that has the Codec Type set to H264.
Related Topics and Dependencies
The parameters displayed below are the parameters that are currently supported on the IMG 2020. Configure each of the fields as required for the network.
Field Descriptions
Payload Type (Default = 97, Range 97 - 127)
The Payload Type field displays the dynamic payload types ranging from 97 to 127. The payload type defines the format of the data that is passed between the IMG 2020 and the far end gateway. Select from the drop down menu the payload type of the packet being offered from the IMG 2020 during the negotiation process. Since the payload types are all above 96 they are all considered dynamic payload types and are negotiated through the SDP negotiation process. After the negotiation process, the payload type being offered from the IMG 2020 and the payload type being offered from the far end must match in order for the call to be processed.
Profile
The profile is an optional parameter and is ignored if not in the SDP offered. The only supported profile for the H.263_2000 codec is Profile 0. Profile 0 specifies the Baseline H.263. The Profile field automatically sets the default value and cannot be modified.
Level
The Level parameter specifies the level of complexity of the decoding process. The selections from the drop down menu are 10, 20, 30, and 45. Refer to the ITU Recommendations H.263 Annex X for more information on the Level field.
Level | Max Picture Format (w x h) | Min Picture IntervalFrame Rate | Max bit rate 64 kbits/unit |
10 | QCIF (176 x 144) | 2002/(30 000) s | 1 |
20 | CIF (352 x 288) | 2002/(30 000) s | 2 |
30 | CIF (352 x 288) | 1001/(30 000) s | 6 |
45 | QCIF (176 x 144) | 2002/(30 000) s | 2Â |
Level Resolution
The Level Resolution field gives the user the ability to modify the horizontal and vertical resolutions in pixels in the video signals. Currently the only supported Resolution is QCIF @ 15 frames per second. The QCIF-15 fps selection utilizes QCIF (Quarter Common Intermediate Format) and has a resolution of 176 x 144 pixels at 15 fps