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I need extract this firmware file. I tried firmwaremodkit and binwalk. It founds two trx headers, but cannot open it.( delete start in hexedit and untrx throws segfault, fmk found nothing)...
Interesting is the constant repetition of the sequence: 00 00 11 53 48 44 52
Some tips how extract it?
It is an encrypted firmware of the GBR2851T Freeview HD Digital Receiver, so you cannot extract it without the proper encryption key.
If you are interested in i-CAN (ADB) internals, see the following vulnerability report http://www.security-explorations.com/materials/se-2011-01-adb.pdf.
5[id] 00 length, where id somehow indicates how length must be interpreted. For theSHDRblocks it's always11, all next blocks say0480, which is might mean "4 * 0x8000" but appear to be 0x2001C bytes long. The last 4 bytes of each block look like a CRC.