|
|
发表于 2007-2-10 01:31:38
|
显示全部楼层
re:5G 无线数字音视频传输模块介绍：...
5G 无线数字音视频传输模块介绍：
$ R# ?( T! v& P8 X
) I; s$ i( E- Z& P+ g# _0 k
1. Key Features
6 t6 {3 \& Y! H, v. L& d1) Complete transceiver design of wireless communication at 5 GHz.
- Y9 A' E9 N" Y/ _% O- H2 q
2) Supports 4.9 to 5.9 GHz frequency band and is controlled by software to comply with
. V( |3 P# L( x5 T" c
different country spectrum requirements.
2 t" C4 z( r% }' |% D/ e+ ]; U
3) Dynamic frequency selection to resist interferences.
5 c9 f; q% L- c" j4) Close-loop power control to minimize power consumption and be a friendly neighbor to
0 G) W8 A5 Y5 ?8 K/ q9 v2 Z$ [+ w
other WLAN networks at 5 GHz.
+ p" C* G( J: y
5) Secure networking to assure privacy and content rights protection.
2 k* E3 Y3 l7 l: Z
6) Supports most of the digital video formats at TS layer including MPEG-2, MPEG-4,
. x, ?, l2 o% I, `: C6 _ EH.264 and VC-1 (WM-9).
5 Y7 Y. U H/ @( u# \7) Supports point-to-point video connection with full QoS and point-to-multipoint video
3 O# S9 _' |# L1 ]' N+ f6 l
broadcasting.
5 n/ K4 n. p5 x# p. g9 F. Q
8) Configurable expansion I/O connector enabling easy integration with existing host
" k( t! C: k" z* Y
systems.
. \. S5 j/ w0 i2 g9) HCI interface to the host CPU to enable flexible application development at the host level.
# j, @( X% }- Z4 k2 o
10) Transmission of IR control signals to the video source devices from the TV location.
* w1 w% m4 ~* s$ s' @! k( L
2. System Diagram
% }0 I; \$ i. h/ S& CWAV3000 wireless module creates a proprietary 5 GHz wireless network for MPEG
& ]" z$ P; P5 [* a7 _. _+ t
transport stream (TS) communication. The WAV3000 is a complete wireless transceiver module
& R! `8 H, I( M5 O; ~
that can be integrated as video sender and video receiver according to the host platform. When
6 ]* j. Y, |( gused as video sender, WAV3000 can be embedded in a video source device (DVD, VCR, PVR,
" |& @; x. ^% _- B. k- HSTB, or PC); and when used as video receiver, WAV3000 can be embedded in a video display
" [' C! Y) J0 Q- @% _. ?1 b. ]
device (TV, flat panel or video monitors). So a pair of the WAV3000 provides a complete,
0 ]% f( ?7 m+ r' u: W. Z5 K2 F
glueless wireless connection from TS (of video source) to TS (of video display) with guaranteed
9 q6 c+ w4 `* c! G$ V% [
QoS.
8 d( g6 y, L& J" E6 b$ ~* m
The WAV3000 includes a configurable expansion connector (CEC). All I/O signals can be
2 a1 b a( G }2 N! j5 _
routed and configured through the CEC enabling easy integration with existing host systems.
2 n0 u$ z$ h- s: E
Figure 1 gives a functional block diagram of the WAV3000 and associated personality
" [( H. v6 U$ F' w/ A; tmodule (PM). The personality module intends to simulate the host product platform in which the
, M/ d& N: n3 y) Q3 F& c& L% n
WAV3000 will be integrated. The PM supports demo and evaluation of the WAV3000 with a
* \" }4 e5 p- h3 ^2 ]1 n9 Rvariety of video sources (analog and digital) for different applications. It also provides
7 d# w" ~0 }0 X4 A5 c) Mcapabilities for test and debugging of the core module.
- a# v$ h' z4 A# s( p' \* o, K4 y& u3 Functional Specifications
The WAV3000 supports standard MPEG Transport Stream input and output in either
7 _+ [: Z( p w0 n. z: r
Parallel or Serial mode.
The Tx unit transmits the compressed MPEG TS signal to the Rx unit over the air, using the
$ e8 z; f0 e" o: KWiViTM wireless networking technology at 5 GHz.
Supports 4.9 to 5.9 GHz frequency band and is controlled by software to comply with
- { d* S' \% O% {- b7 b- Pdifferent country spectrum requirements.
The system support data rates from 6 Mbps to 60 Mbps.
The system supports video bit rates from 3 Mbps to 45 Mbps.
Proprietary radio resource control with dynamic frequency selection (DFS) and close-loop
/ z( s: X4 v0 i% ], _ Fpower control (CLPC).
Overall video propagation delay of less than 30 ms.
Receive sensitivity is –86 dBm for video rate of 6 Mbps, and –78 dBm for video rate of 20
- D* T- p3 i# I6 p; P
Mbps.
% N0 ]* @, u- O5 ~$ T. K' z4 System Security
: |% j4 h) s# N- P% a3 ?+ M3 J) o
The communication is authenticated and the media stream is encrypted to assure for
- O0 h1 I- D& B( [$ \
protection of copyrighted material. Flexible pairing procedure between each Tx Unit and Rx Unit
9 U1 d) `: J: N2 F, s
ensures private communications between each pair of units. This also allow for coexistence of
& Y) f3 c3 X E- C
multiple pairs of simultaneous operations without cross talk.
+ o1 W9 X, W8 C+ e' r/ J' x 此主题相关图片
( X* L) Y- Q8 q8 v a! K! L
0 T0 o9 |( O7 z3 U5 P; {( t, `6 o< |
|
IP卡
狗仔卡
显身卡
楼主
