OK, I took some time out and did some research. The results are pasted below:
STB: Videocon D2H with HD (no DVR). Latest white colored STB. Download ID is showing as 8 (Please don't ask me to re-check. I have re-checked. Probably on the newer model (white colored) STB, it's giving audio through HDMI even on Download ID 8)
Connection: STB -> Onkyo 616 (HDMI) -> Sony KDL-42W674A TV.
Audio Info checked through the Onkyo Receiver
No other Co-Ax/ Opt connection between the STB and the Onkyo
Star Plus HD - 102 - Dolby Digital 5.1 Ch 48 kHz - Genuine HD (Dialog through center)
Zee TV HD - 104 - PCM 2.0 Channel 48 kHz
Colors HD - 106 - Dolby Digital 5.1 Ch 48 kHz - Fake HD (Dialog coming through all 3 fronts)
Life OK HD - 108 - Dolby Digital 5.1 Ch 48 kHz - Genuine HD (Dialog through center)
Sony HD - 110 - Dolby Digital 5.1 Ch 48 kHz - Fake HD (Dialog coming through all 3 fronts)
Zee Cinema HD - 204 - PCM 2.0 Channel 48 kHz
Star Gold HD - 206 - Dolby Digital 5.1 Ch 48 kHz - Genuine HD (Dialog through center)
Star Movies HD - 242 - Dolby Digital 5.1 Ch 48 kHz - Genuine HD (Dialog through center)
Zee Studio HD - 248 - Dolby Digital 5.1 Ch 48 kHz - Fake HD (Dialog coming through 2 fronts) (But the movie seemed to be a very old movie called 'Shadow Conspiracy'. Dont know if they had 5.1 back then

)
Movies Now HD - 256 - Dolby Digital 5.1 Ch 48 kHz - Genuine HD (Dialog through center)
CNBC Prime HD - 382 - PCM 2.0 Channel 48 kHz
ESPN HD - 402 - PCM 2.0 Channel 48 kHz
Star Cricket HD - 404 - Dolby Digital Ex 6.1 CH 48 kHz - Fake HD (Commentary coming through all 2 fronts)
Ten HD - 408 - PCM 2.0 Channel 48 kHz
Sony Six HD - 424 - Dolby Digital 5.1 Ch 48 kHz - Fake HD (Commentary coming through 2 fronts)
M Tunes HD - 560 - Dolby Digital 5.1 Ch 48 kHz - Fake HD (Vocals coming through 2 fronts) (Here I'm going to go out on a limb and say this is acceptable because if the vocals for songs (Music) are pushed through a center channel then it kinda kills the concept of nice big floorstanders for the fronts doesnt it!

)
Discovery HD - 602 - Dolby Digital 5.1 Ch 48 kHz - Fake HD (Dialog coming through all 3 fronts)
History HD - 604 - PCM 2.0 Channel 48 kHz
NGC HD - 606 - Dolby Digital 5.1 Ch 48 kHz - Genuine HD (Dialog through center)
Travel XP HD - 640 - PCM 2.0 Channel 48 kHz
Star World HD - 654 - Dolby Digital 5.1 Ch 48 kHz - Genuine HD (Dialog through center) (But there's something wrong with the audio-quality for this channel. Very low volume and unclear audio)