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參數資料
| 型號： | H.261 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | LINE TRANSMISSION OF NON-TELEPHONE SIGNALS |
| 中文描述： | 線傳輸非電話信號 |
| 文件頁數： | 5/31頁 |
| 文件大?。?/td> | 123K |
| 代理商： | H.261 |
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Recommendation H.261 (03/93)
T 1 5 0 2 4 3 0 9 0 d 0 1
C o d i n g c o n r o l
S o u c e
c o d e
S o u c e
d e c o d e
V i d e o m u l p e x
c o d e
V d e o m u l p e x
d e c o d e r
T r a n s m i s s o n
b u f e r
R e c e v n g
b u f e r
T a n s m i s o n
c o d e r
C o d e d
b s t e a m
V d e o
s g n a
a V d e o c o d e r
b V d e o d e c o d e r
E x e r n a c o n t o l
R e c e i n g
d e c o d e
F G U R E 1 H 2 1
O u t n b o c k d a g r a m o t h v d o c o d e c
FIGURE 1/H.261...[
D01
] = 9 CM
2.1
Video input and output
To permit a single Recommendation to cover use in and between regions using 625- and 525-line television standards, the
source coder operates on pictures based on a common intermediate format (CIF). The standards of the input and output
television signals, which may, for example, be composite or component, analogue or digital and the methods of performing
any necessary conversion to and from the source coding format are not subject to Recommendation.
2.2
Digital output and input
The video coder provides a self-contained digital bit stream which may be combined with other multi-facility signals (for
example as defined in Recommendation H.221). The video decoder performs the reverse process.
2.3
Sampling frequency
Pictures are sampled at an integer multiple of the video line rate. This sampling clock and the digital network clock are
asynchronous.
2.4
Source coding algorithm
A hybrid of inter-picture prediction to utilize temporal redundancy and transform coding of the remaining signal to reduce
spatial redundancy is adopted. The decoder has motion compensation capability, allowing optional incorporation of this
technique in the coder.
2.5
Bit rate
This Recommendation is primarily intended for use at video bit rates between approximately 40 kbit/s and 2 Mbit/s.
2.6
Symmetry of transmission
The codec may be used for bidirectional or unidirectional visual communication.
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| H1- | NPN/NPN resistor-equipped transistors R1 = 47 kohm, R2 = open |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| H2610(SERIES) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Peripheral IC |
| H2610-10M | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Peripheral IC |
| H2610-210M | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Peripheral IC |
| H-2616-033 | 制造商:SAIA-BURGESS LEDEX AND DORMEYER PRODUCTS 功能描述:H-2616-033 / ROTARY / 3ER45o X3X4X6X9 |
| H-2617-026 | 制造商:SAIA-BURGESS LEDEX AND DORMEYER PRODUCTS 功能描述:H-2617-026 / ROTARY / 5ER45o X3X4X6X9 |
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