PS3 HD 音效問題

stm

我用緊肥版ps3+Y記 amp，經optical 連接。
以小弟的理解，肥版PS3係出唔到bitstream，即係高清音效會經PS3解碼，轉為LPCM出去AMP
今日手痕轉下setting，firmware 3.3 發覺多左兩個叫Bistream (Mix) 同 Bitstream (Direct)，另一個就係 LPCM

正路諗法就係用LPCM，因為肥版出唔到bitstream，但係d聲唔掂，現場感大減。
轉去bitstream就正常番，但係Mix / Direct 我聽唔出分別。據網上睇話 Mix 係將Primary 同 Secondary (button?) 合埋出去AMP。
但肥版係出唔到bitstream，咁其實佢又出緊乜呢...........係咪都係PS3 解左先轉番 DD/DTS 咁出?
但係音效同用 LPCM 差幾遠下。其實需唔需要配合BD入面揀LPCM 定DTS-HD MA / TrueHD 等等?

有少少confuse......唔知有無師兄可以解下我聽??
Thanks!!

jerryhkm

PS3 (old version) can output bitstream but not bitstream for DTS-HD MA / True HD but DTS&DD only.

For DTS-HD MA / True HD output to be available, you need to set it to LPCM rather than bitstream, however, the optical output's bandwidth is not large enough for 5.1/7.1 LPCM.

The conclusion is you need to use HDMI for connection before can output HD decoding through LPCM using PS3 internal decode.

hanabi

舊版PS3沒有DTS-HDMA和TRUE HD, 睇清楚PS3 SPEC就知, SLIM版本才新增這音效.
因為是硬件問題, 不能用軟件升級
我都係因此而買多部SLIM作BD PLAYER

jerryhkm

hanabi c-hing,

Not exactly. After update of firmware 舊版PS3 have DTS-HDMA and True HD output via LPCM by means of internal decode.

PS3 Slim have bitstream output through HDMI for HD AV Amp for decoding which old version don't have.

ballvball

用光纖或同軸,因流量問題,係唔會出倒DTSHD和 DD TRUE HD的,最多係DD或DTS,和LPCM 2.0,要出倒DTSHD 和DD TRUE HD,就一定要用HDMI線落AMP!!

stm

其實我明你地講乜.....但我諗唔明:
如果我揀Bistream (Mix) / Bitstream (Direct)有聲出係因為PS3 internal decode?
咁我揀LPCM其實都係PS3 internal decode，點解效果會唔同??

karl1985

會唔會係
LPCM行2.0
BITSTREAM行DTS&DD 5.1

tkc884

ching why 3.3 ver, mine is 3.42 ver now