星期五, 12月 29, 2006
星期二, 12月 26, 2006
Media
DV or MiniDV Tape
Video signal
720/60p, 720/30p, 720/50p, 720/25p, 720/24p, 1080/60i, 1080/50i, 1080/25p, 1080/30p, 1080/24p
Video sampling frequency for luminance
74.25 MHz (720p), 55.6875 MHz (1080i)
Video Chroma subsampling
4:2:0
Video sample quantization
8 bits (both luma and chrominance)
Video Compression
MPEG2 Video (profile & level: MP@H-14)
Video compressed bitstream rate
Approximately 25 Mbit/s for 1080i / 19.7 Mbit/s for 720p
Audio sampling frequency
48 kHz
Audio quantization
16 bits
Audio compression
MPEG-1 Audio Layer II
Audio compressed bitstream rate
384 kbit/s (192 kbit/s per channel)
Audio mode
Stereo (2 channels); optional 4-channel MPEG-2 Audio Layer II at 96 kbit/s per channel mode
MPEG Stream type
Transport Stream Packetized Elementary Stream
Stream interface
IEEE 1394a Apple FireWire 400 or Sony i.LINK (MPEG-2 TS)
File extension
Usually saved as .m2t
DV or MiniDV Tape
Video signal
720/60p, 720/30p, 720/50p, 720/25p, 720/24p, 1080/60i, 1080/50i, 1080/25p, 1080/30p, 1080/24p
Video sampling frequency for luminance
74.25 MHz (720p), 55.6875 MHz (1080i)
Video Chroma subsampling
4:2:0
Video sample quantization
8 bits (both luma and chrominance)
Video Compression
MPEG2 Video (profile & level: MP@H-14)
Video compressed bitstream rate
Approximately 25 Mbit/s for 1080i / 19.7 Mbit/s for 720p
Audio sampling frequency
48 kHz
Audio quantization
16 bits
Audio compression
MPEG-1 Audio Layer II
Audio compressed bitstream rate
384 kbit/s (192 kbit/s per channel)
Audio mode
Stereo (2 channels); optional 4-channel MPEG-2 Audio Layer II at 96 kbit/s per channel mode
MPEG Stream type
Transport Stream Packetized Elementary Stream
Stream interface
IEEE 1394a Apple FireWire 400 or Sony i.LINK (MPEG-2 TS)
File extension
Usually saved as .m2t
Audio (MP3)
32 kbit/s — MW (AM) quality
96 kbit/s — FM quality
128 - 160 kbit - Ok quality, difference can be heard by a sharp ear
192 kbit/s — Good quality, difference can only be heard by a few
224 - 320 kbit/s — High quality, nearly lossless quality
Other audio
4 kbit/s — minimum necessary for recognizable speech (using special-purpose speech codecs)
8 kbit/s — telephone quality (using speech codecs)
500 kbit/s - 1 Mbit/s — lossless audio as used in formats such as FLAC, WavPack or Monkey's Audio
1411 kbit/s - PCM (WAV) sound format of Compact Disk Digital Audio
Video (MPEG2)
16 kbit/s — videophone quality (minimum necessary for a consumer-acceptable "talking head" picture)
128 – 384 kbit/s — business-oriented videoconferencing system quality
1 Mbit/s — VHS quality
5 Mbit/s — DVD quality
15 Mbit/s — HDTV quality
32 kbit/s — MW (AM) quality
96 kbit/s — FM quality
128 - 160 kbit - Ok quality, difference can be heard by a sharp ear
192 kbit/s — Good quality, difference can only be heard by a few
224 - 320 kbit/s — High quality, nearly lossless quality
Other audio
4 kbit/s — minimum necessary for recognizable speech (using special-purpose speech codecs)
8 kbit/s — telephone quality (using speech codecs)
500 kbit/s - 1 Mbit/s — lossless audio as used in formats such as FLAC, WavPack or Monkey's Audio
1411 kbit/s - PCM (WAV) sound format of Compact Disk Digital Audio
Video (MPEG2)
16 kbit/s — videophone quality (minimum necessary for a consumer-acceptable "talking head" picture)
128 – 384 kbit/s — business-oriented videoconferencing system quality
1 Mbit/s — VHS quality
5 Mbit/s — DVD quality
15 Mbit/s — HDTV quality
星期日, 12月 24, 2006
星期六, 12月 23, 2006
星期四, 12月 21, 2006
星期二, 12月 19, 2006
星期五, 12月 15, 2006
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PrimoPDF
PDFCreator
CutePDF
PDF ReDirect
自己只有用過PDF ReDirect,聽說PrimoPDF也不錯還支援64-bit 也!
星期一, 12月 11, 2006
星期日, 12月 10, 2006
星期三, 12月 06, 2006
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