6 g) L0 C, q8 I解码的话,,,找个PowerDVD,,就OK啦作者: hyperx1911 时间: 2009-9-26 01:05
摘录一段给楼主看看The ALC885 used to be the high-end codec, and is still used by DFI for their mainstream, (with the ALC889 creeping in at the top end). It is fairly competent and is good enough for most uses with its >100dB SNR. The ALC882 is similar. The ALC888 (in many variants like ALC888S and so on) is the most common codec seen today. It's predecessor was the similar but slightly lower performance ALC883. It is OK, but falls short of the desired 100dB ADC/DAC SNR performance that enthusiastic samplers or music lovers want. MSI seem to have the ALC888 implimentation at its best, although that is the best of a mediocre job. The ALC889/889A is an upmarket ALC888 and easily meets the 100dB SNR. I suspect it is an upgraded/graded ALC888. The ALC889A is a Gigabyte designation. The ALC890 is another improved ALC888, but only used by Asrock and probably a rebadged ALC889. ASUS have a non-standard codec, the ALC1200. This is believed to be an ALC888S or T in drag. Since Gigabyte have their own "type", Asus had to have one too. 5 u: V$ ^4 C. r, X5 ?$ v
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源码输出。。。。。。。。。硬解是针对模拟输出2 T, G w' {) z0 p
HDMI1.3源码输出至外部解码器bitstream输出,u know?作者: johnnyshi 时间: 2009-9-26 01:12 http://we.pcinlife.com/redirect.php?tid=1259597&goto=lastpost, I* i* r( {% Y1 I$ N http://www.anandtech.com/video/showdoc.aspx?i=3643&p=10 ' ^- e; D# V; n e) x8 U5 m; u& I ; D+ D; o' z. V: U' DThe Race is Over: 8-channel LPCM, TrueHD & DTS-HD MA Bitstreaming 0 T7 W& }6 ~5 U ?8 g5 O9 j " i; D+ j, \+ m/ S7 TIt's now been over a year since I first explained the horrible state of Blu-ra - x9 m( q$ Q D" Vy audio on the PC. I'm not talking about music discs, but rather the audio com ; I, C/ f/ x* a4 E9 z0 U. N4 yponent of any Blu-ray movie. It boils down to this: without an expensive sound) f( W+ E* ]% x7 G
card it's impossible to send compressed Dolby TrueHD or DTS-HD Master Audio s 9 h ?4 [. W" v% r0 M4 _treams from your HTPC to an AV receiver or pre-processor. Thankfully AMD, Inte9 p9 Y" `; K- I& ^* i2 P
l and later NVIDIA gave us a stopgap solution that allowed HTPCs, when equippe$ j3 L# D- k- t! X$ h: i, B M
d with the right IGP/GPU, to decode those high-definition audio streams and se ( r9 G4 @+ I% z5 V% cnd them uncompressed over HDMI. The feature is commonly known as 8-channel LPC$ l( G7 ^; u, P/ p; k
M support and without it all high end HTPC users would be forced into spending + r9 S: v) S3 S' oanother $150 - $250 on a sound card like the Auzentech HomeTheater HD I just + X6 c& K7 P) L. I# p; F2 brecently reviewed. 3 q: `' R1 O* I/ O: y & M$ G& `' H7 Z0 [; WFor a while I'd heard that ATI was dropping 8-channel LPCM support from RV870 ' B0 z t6 q/ A7 d- _# w- s
because of cost issues. Thankfully, those rumors turned out to be completely u4 w/ K. [! F" M6 H
ntrue. Not only does the Radeon HD 5870 support 8-channel LPCM output over HDM+ n, ~9 b6 t5 D: n
I like its predecessor, but it can now also bitstream Dolby TrueHD and DTS-HD 3 t3 g. o6 b0 u GMA. It is the first and only video card to be able to do this, but I expect ot4 U3 k$ `# ^5 ^- Z+ ]% a! v9 x* p
hers to follow over the next year. 2 u2 |8 `! K9 _5 Y# k c/ j- v6 N& a4 A: w3 E
The Radeon HD 5870 is first and foremost a card for gamers, so unless you're b8 S- k! H% C+ L+ p: O, Q
uilding a dual-purpose HTPC, this isn't the one you're going to want to use. I / e( L) p1 ~2 T9 T6 Q hf you can wait, the smaller derivatives of the RV870 core will also have bitst 1 w5 Z8 p: r9 \) `4 K# R Yreaming support for TrueHD/DTS-HD MA. If you can't and have a deep enough HTPC ; _4 ?3 m% w ~9 Ncase, the 5870 will work. & M2 E. g: G& Y5 G/ X6 o2 ?- X8 |4 C# X: J
In addition to full bitstreaming support, the 5870 also features ATI's UVD2 (U. b1 s0 s) s! h9 `0 Y. _
niversal Video Decoder). The engine allows for complete hardware offload of al3 @7 V, R2 `# w# H! H; e ^
l H.264, MPEG-2 and VC1 decoding. There haven't been many changes to the UVD2 7 r( n0 }% |8 R7 O9 Eengine; you can still run all of the color adjusting post-processing effects a/ D) l7 p' Y* B* [$ u0 k, C; w
nd accelerate a maximum of two 1080p streams at the same time. 1 w4 o/ o; d; n; p0 q t7 g* Q' d ' B! `/ L E# U/ T/ R5 A1 hATI claims that the GPU now supports Blu-ray playback/acceleration in Aero mod; [6 J! n# o+ Y9 C5 j* `$ a
e, but I found that in my testing the UI still defaulted to basic mode.6 [4 S; X( z1 X$ T. s
" e, H0 K/ U* l4 L+ yTo take advantage of the 5870's bitstreaming support I had to use a pre-releas . L+ z* S3 c# d3 a, s% ze version of Cyberlink's PowerDVD 9. The public version of the software should! ?9 b* B. G9 v9 A
be out in another week or so. To enable TrueHD/DTS-HD MA bitstreaming you hav ) k: _& Z* O; \6 ^- u9 t' l) Te to select the "Non-decoded high-definition audio to external device" option 8 g: z2 {8 r. Q; |in the audio settings panel:: O( Y2 r- i+ ]0 m, W
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With that selected the player won't attempt to decode any audio but rather pas2 |; Q5 ~8 H3 X) R
s the encoded stream over HDMI to your receiver. In this case I had an Integra. I$ B$ L, H6 x- u$ D
DTC-9.8 on the other end of the cable and my first test was Bolt, a DTS-HD MA $ D- w0 Z! r. b, h) i# {# atitle. Much to my amazement, it worked on the first try:, c/ u! p! s# B9 N5 X
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No HDPC errors, no strange player issues, nothing - it just worked. 1 o6 L! N2 n3 ?2 ` 6 s2 P [& S$ R8 q% ~7 Y& Q7 _$ JNext up was Dolby TrueHD. I tried American History X first but the best I coul1 K5 T* Z4 Q0 i1 R. I* z
d 【请注意文明用词】 of it was Dolby Digital. I swapped in Transformers and found the sam * v! g4 x: ^) x4 P% oe. This ended up being an issue with the early PowerDVD 9 build, similar to is7 C$ r1 j: D5 {8 ]! L
sues with the version of the player needed for the Auzentech HomeTheater HD. S' i( l8 ?, x5 O o6 S* l
witching audio output modes a couple of times seemed to fix the problem, I now 7 \1 y4 s5 z0 L" hhad both DTS-HD MA and Dolby TrueHD bitstreaming from the Radeon HD 5870 to m3 N. b J A: P+ S3 B+ {" d, q
y receiver. ; c( P& ]8 T6 L+ ~! X6 T- R& F# O2 J + |6 C3 D5 V6 I9 jOne strange artifact during my testing was the 5870 apparently delivered 1080i" w: I+ b5 T* E% p( ~- K4 H- C
output to my JVC RS2 projector. I'm not exactly sure what went wrong here as 4 e. x9 } R; O: W! `' @1080p wasn't an issue on any other display I used. I ran out of time before I : t' ~* f6 i6 {5 L
could figure out the cause of the problem but I expect it's an early compatibi * b( w& o7 v( G1 wlity issue. L) ~" m9 h9 l, n4 ?
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I can't begin to express how relieving it is to finally have GPUs that impleme9 @" I u% r6 Q4 l: p
nt a protected audio path capable of handling these overly encrypted audio str$ b3 b/ S( ?9 F# _% [
eams. Within a year everything from high end GPUs to chipsets with integrated % E0 ~( {5 E) X$ ?, F! \: Jgraphics will have this functionality.作者: hyperx1911 时间: 2009-9-26 01:15
至于你说的硬解,官网上直接有http://www.realtek.com.tw/produc ... px?Langid=1&PNid=24&PFid=28&Level=5&Conn=4和http://www.realtek.com.tw/produc ... px?Langid=1&PFid=28&Level=5&Conn=4&ProdID=173其中889形容是“The ALC889 supports host audio from the Intel chipsets, and also from any other HDA compatible audio controller. With various software utilities like environment sound emulation, multiple-band and independent software equalizer, dynamic range compressor and expander, optional Dolby® Digital Live, Dolby® PCEE program and DTS® CONNECT™, the ALC889 provides the highest sound quality, providing an excellent entertainment package and game experience for PC users. X; M2 I4 D) u " ~$ ~, k/ w* q% F这些解释在ALC888S-VC / ALC888 / ALC888S也是类似的表述 # A% u$ C. ^4 S% t* a' ]$ o% j; o4 V ^% U' i# @