其實點解唔同 BDP 出來既聲會有明顯分別？

patrick12345

以小弟既理解, BDP 如是設定 bitstream (原碼)由 hdmi 輸出到 amp,
即是 bdp 只是原汁原味咁將 bd 內既 source read 出來直接傳送到 amp 去處理解碼工作。

如果咁樣, 即是好唔好聲, 尾音靚唔靚應該只係同部 amp 有關？
點解各位會話換了 BDP 後聲會不同？照道理換機後 amp 方面所收到既 source 應該係從來無分別？

timlee672

每部機既輸出缐路都唔同，又點會一樣呀！

老五

如果好似師兄咁講貴價BDP重會有人買。

tinghai

回復 1# patrick12345

你講得全對係數碼傳輸係對音質原全無影響，如果唔係用Bluray碟或DVD去做data backup 咪死得?，但由數碼轉為模擬，由DAC到Amp既circuit 就一定有分別,不過我個人認為最大影響係對揚聲器，因為電子線路你可設計到frequency response 平直低失眞但最後係由對揚聲器將電子訊息轉化為聲音當中既tranducer同cross over circuit係最容易影響到岀黎既聲而且受物理影響最大。

bbsai

回復 1# patrick12345

之前我都有和網友討論過....

我發覺有件事幾有趣, 其實用bitstream都會有唔同, 之前我由sony 350>370, 大家用bitstream 入amp, 370 令後置 speaker 表現和 350 有不同, 係聽多咗嘢. 直到現在 BDP LX-55, 個包圍感係比370 更好, 雖然都係bitstream, 我開始懷疑當年研究dtsHD/dolby True HD, 除咗基本聲音的record, 應該有留一d bits (packets) for "音效effect" 改變, 所以用 bitstream, 都會有分別.

所以我明白你的理解!

tinghai

Professional reference on this subject:

http://reviews.cnet.com/4520-13817_7-6462511-4.html

"One last point: contrary to what you might hear elsewhere, there's absolutely no sound-quality difference whether the decoding takes place in the receiver or the Blu-ray player. The common analogy is to "zipping" a file on your computer; it's the exact same file if you unzip it on another computer. The only real difference is that if you use onboard decoding on your Blu-ray player, you won't see the "Dolby TrueHD" or "DTS-HD Master Audio" lights on your receiver. That's because the receiver only knows it's receiving a linear PCM signal; it doesn't know how that linear PCM signal was previously compressed."

因為TrueHD 或DTS-HD係碟上是壓縮檔案要unpack先可以變回LPCM，bitstream 既意思係unpack 既動作係receiver 發生所以不同BDP bitstream 出來的檔案是百分百一樣。唯一係必須用HDMI 1.3 或以上connection

patrick12345

回復  patrick12345

之前我都有和網友討論過....

我發覺有件事幾有趣, 其實用bitstream都會有唔同, 之前 ...
bbsai 發表於 2012-1-1 17:45

但下面位 CHING 講既又真係有道理喎？？？
你試過聽真係會有明顯不同？

鐵心心

用唔同hdmi都唔同效果,
玩av/hifi
換個插頭都唔同聲,

鐵心心

但下面位 CHING 講既又真係有道理喎？？？
你試過聽真係會有明顯不同？
patrick12345 發表於 2012-1-2 00:56

極大分別

你聽過就唔會再咁問了

jjjjjn

覺得D軟件都很重要部份