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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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
星期四, 11月 30, 2006
星期二, 11月 28, 2006
星期日, 11月 26, 2006
星期六, 11月 25, 2006
星期五, 11月 24, 2006
星期一, 11月 20, 2006
星期五, 11月 17, 2006
星期二, 11月 14, 2006
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