Informatika_Лекц1
.pdf1.2.4
Hz
1.13.
~ 20,854 0,856 002 )
(sampling rate
(sampling size
.
1)
.
N = 2I = 216
2) .
. - .
.
48 -CD.
. 3)
1.2.5
).
PAL SECAM
NTSC
.
-
-, Blu-Ray
MPEG (Moving Picture Experts
MPEG-1
MPEG-7 MPEG-21.
http://www.mpeg.org.
4.
|
PAL / NTSC |
|
|
|
- |
|
|
|
|
|
|||
|
|
|
|
|
|
|
VCD |
|
MPEG-1 |
MPEG-1 |
|
|
|
|
|
|
|
|
|
|
SVCD |
|
MPEG-2 |
MPEG-1 |
|
|
|
|
|
|
|
|
||
DVD |
|
MPEG-2 |
MPEG-1, AC3 |
|
||
|
|
|
|
|
|
|
XVCD |
|
MPEG-1 |
MPEG-1 |
|
|
|
|
MPEG-2 |
|
|
|||
|
|
|
|
|
||
DivX |
|
MPEG-4 |
MP3, WMA |
|
||
HDTV |
|
MPEG-4 |
MP3, WMA, |
BD- |
||
720p |
|
H.264 |
AC3 |
|
||
|
|
|
||||
HDTV |
1920 |
MPEG-4 |
MP3, WMA, |
BD- |
||
(i |
||||||
1080i |
H.264 |
AC3 |
. |
|||
) |
|
|||||
|
|
|
|
|
||
AVCHD |
(p |
MPEG-4 v.10 |
PCM (7.1) |
|
|
|
720p |
(AVC/H.264) |
AC3 (5.1) |
|
|
||
|
|
|
||||
|
|
|
|
|
|
|
AVCHD |
192 |
MPEG-4 v.10 |
PCM (7.1) |
|
|
|
1080i |
(AVC/H.264) |
AC3 (5.1) |
|
|
||
|
|
|
MPEG (MPEG-1, MPEG-2, MPEG-4, MPEG
I- frame - P-
-- B- (Bidirectional frame
MPEG-4
-
- |
|
|
MPEG-4 |
AVC/H.264 |
|
H.264) |
AVCHD (Advanced |
|
Video Codec High Definition |
||
|
||
) |
720p |
1080i AVCHD
AVC/H.264.
MPEG
- (Multimedia Content
Description Interface)
MPEG, MPEG-
MPEG-7
.
-
-
MPEG-1, MPEG-2, MPEG-4 MPEG-7.
MPEG-21
(Multimedia Framework).
MPEG-21 :
Microsoft AVI MKV
AVI Video, Audio,
MIDI, Te
MKV (Matroska)
MKV -
DVD Blu-Ray mkv -
.
1.2.6
(data compression
,
JPEG, TIFF, GIF, PNG MP3 MPEG-4.
1)
Length Encoding RLE).
44 44 44 11 11 11 11 11 01 33 FF 22 22 03 44 04 11 00 03 01 33 FF 02 22
,
(00 03).
2)
ASCII.
.
:
|
A |
B |
C |
D |
E |
|
|
F |
|
10 |
20 |
30 |
5 |
25 |
|
10 |
|
|
|
|
|
: |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
C |
E |
B |
F |
A |
|
|
D |
|
30 |
25 |
20 |
10 |
10 |
|
5 |
|
, |
|
|
(10) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
: |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
C |
E |
B |
F |
A |
|
|
D |
|
30 |
25 |
20 |
10 |
10 |
|
5 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
A |
|
15 |
|
|
|
|
|
|
|
|
|
|
.
|
C |
E |
B |
F |
|
|
|
A |
|
|
|
D |
|||
|
30 |
25 |
20 |
10 |
|
10 |
|
|
5 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
15 |
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
25 |
|
|
|
|
|
|
|
|
(
E).
|
C |
|
E |
|
|
B |
|
F |
|
|
A |
|
|
D |
|||
|
30 |
|
25 |
|
20 |
|
10 |
|
10 |
|
5 |
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
55 |
|
|
|
|
|
|
|
|
|
|
15 |
|
||
|
|
|
|
|
|
|
|
|
|
|
|
25 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
45 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Root |
|
|
|
|
|
|
|
|
|
= 0
= 1 (
00. E)
C= 00 ( )
E= 01
B= 10
F= 110
A= 1101
D= 1111
3)