The SDI24A high-definition or standard-definition encoder module generates an MPEG2 or MPEG4 (H.264) video stream derived from an SDI or HD SDI source, with Dolby® AC3 or MPEG1 layer 2 audio. This module is designed to be installed into Drake's EH24, EH244 or MEQ1000-style chassis which provides control and output interface to unit. This configuration of encoder module and host chassis provides ultimate in bandwidth management and economy by allowing multiple HD and SD streams to be multiplexed together dependent upon limitations of bandwidth of chosen output QAM and/or ASI (see EH24, EH244 and MEQ1000 manuals for more information on multiplexing). The SDI24A encoder accepts broadcast type SDI or HD SDI video with embedded audio. The SDI24A is also provisioned with a set of RCA L/R inputs for adding audio from an analog source.