hpkpk123

隔離X登見過類似討論

有人舉例數碼嘅HDMI線太長都會起格;
數碼廣播收得差一樣有機會花畫面
所以唔可以話一句數碼就可以粗暴地分成100% or 0%
最後成品有冇分別都係睇播放器點處理

不過啲咩靚聲ssd就...
咁講，如果用咗真係覺得好聽啲嘅(自我感覺良好)
個人覺得絕對係物有所值嘅

marcochl

回覆 351# hpkpk123

""有人舉例數碼嘅HDMI線太長都會起格;
數碼廣播收得差一樣有機會花畫面
所以唔可以話一句數碼就可以粗暴地分成100% or 0%""
>>呢到其實係mix up 左概念, 數碼既意思係, 假如100分滿分, 50分合格, 50分出黎既效果其實係同100分一樣, 而任何低過50分既signal 都已經係損毀左(Invalid) 既signa, 結果就係爆格/窒機/黑畫面/sparkle 之類, 所以一條合格既線就夠用 (呢到亦都要提一提所有線都有個上限長度, 所以先有"amplifier" / "repeater" 果類產品)

提到線材就要提埋bandwidth, 呢個係線材導體既物理限制 (例如有幾粗, shielding 有幾好), 例如吹到幾勁既18Gbps 線(如果上限只得18) 係做唔到48Gbps 線做到既野 (例如8K)


最後成品有冇分別都係睇播放器點處理
>>呢個真, 有D player buffer 大, 有D player會等, 有D player 會drop, 有D直出, 好視乎programmer 想點

火B

你都係算把la
vpn都未知係乜就學人佈教
nas->lan->router->mondem->大廈switch->地區機樓-> 地區機 ...
madebyp90 發表於 2020-9-9 15:18

#228我都講咗我唔知原理，
我都好想知點解。

我唔知點解，
並唔等於冇嗰件事。

我都唔知點解火箭可以飛去太空又飛番返嚟，
咁係唔係等於呢個世界冇火箭？

你都係跳出個井試吓先啦

火B

同一軟件，同一os
真係cpu微觀問題
   
同zip一樣，etc 10g file
不同cpu zip出不同file size ...，
madebyp90 發表於 2020-9-10 00:45

呢樣真係唔知

blkbd5

#228我都講咗我唔知原理，
我都好想知點解。
我唔知點解，
並唔等於冇嗰件事。
我都唔知點解火箭可以飛 ...
火B 發表於 2020-9-11 04:51

師兄努力，撐到36版了，唔好俾佢停，真心佩服，
繼續同非洲土人講落雪幾靚幾靚，地球唔系方形，
如果在音響區，就會完全唔同！

孤兒仔

隔離X登見過類似討論

有人舉例數碼嘅HDMI線太長都會起格;
數碼廣播收得差一樣有機會花畫面
所以唔可以話一 ...
hpkpk123 發表於 10/9/2020 11:39 PM

當然物有所值啦，做人都係求個開心個腦得到慰藉姐
不過將自己飛支經驗拎出來權威，重要迫人跪拜就等於邪教了

孤兒仔

師兄努力，撐到36版了，唔好俾佢停，真心佩服，
繼續同非洲土人講落雪幾靚幾靚，地球唔系方形，
如果在音 ...
blkbd5 發表於 11/9/2020 07:51 AM

係囉，兩位土著出來就自稱一個祭師一個酋長
說話從開始嘅至尊權威到無語隱身
直到搵到位入已經開口就退一萬步.....
如果去佢條村討論當然唔同啦，文明鬥野蠻唔出槍係死硬

charles2047

師兄努力，撐到36版了，唔好俾佢停，真心佩服，
繼續同非洲土人講落雪幾靚幾靚，地球唔系方形，
如果在音 ...
blkbd5 發表於 2020-9-11 07:51

啲土人真係要努力...最好多啲豬隊友出來玩假膠喺精神上撐住佢地咪畀佢冧.

落雪有幾靚隨住科技發展由影相拍片3D VR 乜都齊, 地球係方係圓, 都係靠科學再配合科技達成認證, 而唔係啲人乜都唔識乜都講感覺, 但個人落去做 A/B TEST 就乜都分唔出既風水佬.

無奈班土人依然點極唔明, 身處喺大都會完全無人明白佢地, 如果換著去返非洲個情況一定好好多, 果度科技落後無咩技術, 唯一專長可能係識點搭靚個壇供獻天神先最虔誠, 心靈上得到最大滿足感. 然後一大班土著圍住堆柴火取笑一下都市人...

madebyp90

回覆  hpkpk123

""有人舉例數碼嘅HDMI線太長都會起格;
數碼廣播收得差一樣有機會花畫面
所以唔可以話一句 ...
marcochl 發表於 2020-9-11 00:38

    hdmi同cd原則上差唔多，miss data冇時間/機制去回應要求resend,一係黑畫面，一係直出爆格
藍牙a2dp都係禁上下，只收不回

而lan cable/wifi唔同
先唔好講lan err bit少之又少
如果個os廢到有錯直出唔要求resend，用wifi只會死得更慘

marcochl

回覆 359# madebyp90

HDMI 用既TMDS 同CD 完全唔同, 除非signal 爛到2 重signal都 fail, 咁就要檢討下條線係咪太長/唔合規格
https://www.cnet.com/news/why-all-hdmi-cables-are-the-same/


The signal
The first thing to understand is what's transmitted over the cable in the first place. HDMI uses Transition Minimized Differential Signaling, or TMDS.

TMDS has two basic aspects. The first is that the ones and zeros at the source (a Blu-ray player or HD cable/satellite box) are not exactly the ones and zeros your TV uses to create a picture -- at least, not in exactly the same order. Before sending the signal out via the HDMI output, the ones and zeros are rearranged to minimize how many transitions there are. So instead of 10101010, the transmission may look like 11110000. If you really like math, how it does this is cool, but it's not really important to understanding the concept as a whole.

Even though this conversion is weird, it makes it much more likely that the data transmitted can be rebuilt on the other end (as in, at the display).

The second part of TMDS (the DS part) is the HDMI cable itself. Each HDMI cable is actually multiple small, copper wires. Two versions of the data are sent over different wires. One of these is out of phase with the "real" signal. The TV receives all the data, puts the out-of-phase signal back in phase, then compares it to the "real" signal. Any noise picked up along the way will now be out of phase, and as such it is effectively negated and ignored.