有哪些廠商在做無線傳送HDMI音、視頻信號晶片？

Jim_Lin

真的有這種產品嗎?
( k9 y) w9 ^7 j1 H  J: n直接用MPEG-2/4/264傳不就不用1Gbps?
還是說RF傳的還是MPEG-2/4/264, 只是Receiver轉成HDMI Interface Output?
這點要搞清楚, 如果RF真的傳的是HDMI Data, 我覺得那真的是很笨的方法.

Jim_Lin

原帖由 heavy91 於 2007-6-28 10:12 AM 發表
0 e: D8 R8 B; ~# q6 W那用Wi-MAX能解決這個問題嗎？

Wi-Fi似乎不能解決耶...頻寬不夠.....==
0 A8 ?4 ^) B( _& L4 F
所以目前似乎還是用cable來傳輸會比較好吧？

不曉得這樣子說對不對？

* A7 m! f8 F  e5 ?0 T& J  O
Wi-MAX目前也不到1G
所以個人認為所謂的” 無線傳送HDMI音、視頻信號”是傳送壓縮資料, 然後Transcode成HDMI Data for HDMI output, 而非直接傳送HDMI資料
: U; `% h- l: E' L, }7 e6 ?Full HD對壓縮資料只要20Mbps以上足以應付
$ m2 J0 S) C7 S' bWi-Fi勉強可以, 802.11n比較適合, 我不認為消費者會採用Wi-MAX作為家庭內部網路之solution
5 B3 f3 B% d  ]0 H
我真的認為不會有那麼笨的人直接傳HDMI Data

[ 本帖最後由 Jim_Lin 於 2007-6-28 11:31 AM 編輯 ]

Jim_Lin

原帖由 heavy91 於 2007-6-28 11:36 AM 發表
# ?% u1 o- n3 B: A# W; a
0 b  z8 D" Y: H

2 ?( K" p% N0 J其實有線的傳輸目前還是比無線的頻寬、速度似乎還是有線的佔優勢吧？

; Z+ K6 P( n2 e. L8 R3 Z' `: a之前有跟Silicon Image的主管聊這方面的問題，
2 D/ }( {/ b3 T# R# i% ^
其實無線傳輸會是未來的趨勢，只是目前要克服的技術問題還很多。
( F' i( J) c% r+ p0 k* D  F
& N3 A0 S. y, n9 P; {) [; Q還是用有線 ...

: b) v0 l# P5 }$ s, v以前我就有提過, 家庭網路是有線, 無線並存
( T1 R* l8 ~4 V/ c線到得了的就用線, 線到不了的就用無線
現在壓縮技術進步, 不需要去做頻寬競爭
- A- x8 o7 N- q0 u2 I, z# a所以消費者以有線為優先不全然是因為頻寬佔優勢, 主要是連線容易, 安全性無虞, 而這些都是無線的弱點, 並不代表無線的頻寬無法吃這些壓縮資料
9 P+ y' ]2 ]9 D
; ?0 Q" T; W/ ~, r0 L# V, G4 X+ p) G沒錯! H.264是目前傳送HD Content的最佳選擇
目前我正在玩Joost P2P網路電視, 它就是用H.264在internet上傳輸
' Y9 D5 w8 I. h' r% ?/ ^由於使用Skype P2P架構, 在Internet上看電腦全螢幕的電視節目竟然可以如此清晰與平順
" V) E, e0 ~( v' b$ M
3 A3 `8 d! Q6 i. i. h0 k& y1 E9 C所以, 有這麼好的壓縮技術(雖然很討厭還要交權利金), 在無線頻寬上競爭有意義嗎?

Jim_Lin

http://www.acesuppliers.com/expo/computex/2007/0607-3.htm
6 w/ [; {6 m  [/ ^  s

Taiwan Excellence Award Winning ASUS WL-HDMI500\ ASUS Wireless HDMI™ Strikes UWB Tech on & h8 p5 ^% W5 }$ [

( E% E  l7 q- k4 Y5 r& R# @ASUSTeK Computer Inc. (ASUS), one of the world’s largest providers of computer products, is introducing a new line of Wireless HDMI products for the digital home, including accessory devices and embedded designs that dramatically simplify connections between home electronic audio and video components.   ; k% `& D1 y1 X% J; p9 _1 L3 v! ~- G" kASUS designed and built these wireless products, which can transmit between rooms with the same quality as wired methods. Input can be HDMI, component video or analog audio. Output to high definition televisions meets HDMI standards; this ensures HDCP (High-bandwidth Digital Content Protection) compliance, which allows protected content to be displayed on an authenticated display. 3 N* u* t, J; D, x8 \/ SWith integrated technology from Tzero, ASUS’s new products will wirelessly connect devices throughout the home. They deliver transmission speeds of up to 480 Mbps, which meets the demands of HD and IPTV. The Tzero platform is based on WiMedia Alliance standards; it is guaranteed to coexist with other WiMedia-compliant devices.   % w( C8 c' F( G* o( `" }" J2 eHD-quality transmission is enabled by Analog Devices’ JPEG2000 video compression ICs, which are compliant with the royalty-free JPEG2000 standard. Video data transmission is compressed using Analog Devices’ ADV202 JPEG2000 video codec; it is then combined with audio and divided into packets for encryption and transmission via the Tzero MAC and PHY chip. This RF chip transmits to a receiver where the HDMI audio/video data is decompressed and presented to the display device via an HDMI port. Analog Devices’ HDMI interface ICs and audio processors complete the design, ensuring the highest quality audio/visual experience. " o! q, \" @6 Q5 ~3 ]' U