Wireless integrated security controller
A system and method are disclosed for improved video transmission, particularly in security settings. An improved security controller combines the interfaces and functionality for high quality video delivery over often less-than-perfect wireless networks, multi-camera analog/digital video controllers and encoders, multi-frequency wireless camera support, connectivity for serial controllers, network switching, and distributed digital video recording with optional object and motion detection. The video transmission in enhanced using wireless adaptive video encoding, mobile viewing optimization, and wireless bandwidth improvement.
1. A method for improving transmission of video information over a wireless network comprising:
the selective application of erasure coding to a digital video data stream according to the type of video frame, wherein additional erasure coding is applied to I video frames as opposed to B or P video frames;
interleaving data at the transmitter, wherein said interleaving resequences a set of data packets before transmitting them to a receiver;
allocating blocks based upon detection of one or more errors;
monitoring a health of said network;
applying a MAC layer protocol enhancement; and
receiving selective acknowledgement from said receiver and retransmitting more important packets as requested by said receiver.
2. The method for improving transmission of video information of claim 1 , wherein said video data stream has a plurality of frames, and said applying erasure coding step is performed selectively based upon a determination of which of said plurality of frame are sufficiently important.
3. The method for improving transmission of video information of claim 1 , wherein said video data stream has a plurality of frames and is compressed using MPEG4 compression.
4. The method for improving transmission of video information of claim 3 , wherein said applying erasure coding step is performed selectively to I frames.
5. The method for improving transmission of video information of claim 1 , wherein said monitoring comprises sensing the state of a wireless channel.
6. The method for improving transmission of video information of claim 1 , wherein said monitoring comprises measuring one or more of the following parameters: round trip time (RTT), packet loss rate, bit rate, retries and link quality.
7. The method for improving transmission of video information of claim 1 , wherein said applying a MAC layer protocol enhancement comprises using User Datagram Protocol.
8. The method for improving transmission of video information of claim 7 , wherein said applying a MAC layer protocol enhancement further comprises multicasting.
9. The method for improving transmission of video information of claim 8 , wherein said applying a MAC layer protocol enhancement further comprises using point coordinated function.
10. The method for improving transmission of video information of claim 1 , wherein said video information comprises security video.
11. The method for improving transmission of video information of claim 1 , wherein said wireless network comprises a home media gateway.