CW-441x - MPEG-4 Encoder


CW-441x - MPEG-4 Encoder

Until analogue systems completely disappear, there are numerous applications, where analogue PAL signals need to be converted to digital data streams. There are also devices delivering uncompressed digital data streams that need to be transmitted, too. In order to avoid excessively high data rates, in the course of the conversion applying some kind of compression procedure (MPEG-2, MPEG-4 etc.) becomes necessary. The device receives at its input the video signal and the accompanying audio signal, performs their compression according to the H.264 standard and outputs them in SPTS (Single Program Transport Stream) form over both ASI and IP output. The outgoing IP data streams can be transmitted towards 4 destinations with unicast or multicast addressing. Additionally, they can be VLAN tagged and therefore delivered to different providers’ network. The output transport stream includes the most important PSI/SI tables (PAT, PMT, SDT, NIT), thus in simpler systems the encoder can be applied even without using a remultiplexer. The device can receive multiple analogue and digital signal formats: CVBS or S-Video, YPrPb as well as HDMI and SDI. The compression can be CBR or VBR. The encoder is capable of processing programs with both standard definition (SD) and high definition (HD). For transmitting the audio channel the two-channel audio coder of the device can be ordered with MPEG-1 audio layer II or MPEG-4 AAC-LC compression system. External S/PDIF signal carrying compressed data can also be inputted. Programming and inspecting all four device versions occur via separate management port from web interface.

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