A SD decoder can only decode SD, not HD, so in that respect it differs from a decoder that can decode hd as well as SD. But IF you have a HD decoder, it will also decode SD, so in effect you only require one decoder in a stb. D. ----- Original Message ----- From: "Prashant Desai" <prashant.desai@xxxxxxxxxx> To: <opendtv@xxxxxxxxxxxxx> Cc: <mp4-tech@xxxxxxxxxxxxxxxx> Sent: Tuesday, February 15, 2005 4:18 PM Subject: [opendtv] Re: HDTV and SDTV Decoders for MPEG-2 and MPEG-4 AVC Hi Donald could not get you on " > You are partly mistaken. Decoders are different, " this decoders are different means ? ..........i mean different with ref. to ? regards, Prashant Desai ----- Original Message ----- From: "Donald Koeleman" <donald.koeleman@xxxxxxxxxx> To: <opendtv@xxxxxxxxxxxxx> Cc: <mp4-tech@xxxxxxxxxxxxxxxx> Sent: Tuesday, February 15, 2005 7:59 PM Subject: [opendtv] Re: HDTV and SDTV Decoders for MPEG-2 and MPEG-4 AVC > You are partly mistaken. Decoders are different, how ever a HD decoder is > supposed to also decode SD, so you just require a single decoder/codec. > > d. > ---------------------------------------------------------------------- You can UNSUBSCRIBE from the OpenDTV list in two ways: - Using the UNSUBSCRIBE command in your user configuration settings at FreeLists.org - By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word unsubscribe in the subject line.