kaiser window에서 beta1=16.7일 때 k=2.23 이라는데, k 값이 그러면 amplitude 관련 보정에 대한 그 계수가 아닌가?
Where k is a window-related coeffcient, N is the number of time-domain samples used in the DFT calculation, and Fs is the sampling frequency. For the Kaiser window with beta1 = 16.7, k is about 2.23. The RBW shape factor, defned as the frequency ratio between the spectrum amplitude at 60 dB and 3 dB, is about 4:1. On the RSA5100/6100, the spectrum analysis measurement uses Equation 2 to calculate the required number of samples for the DFT based on the input span and RBW settings.
인데 NENBW는 normalized effective noise bandwidth of the window 라..
RBW - Resolution bandwidth
Resolution bandwidth of the estimate, returned as a scalar.
The resolution bandwidth, RBW, is the smallest positive frequency, or frequency interval, that can be resolved. It is equal to NENBW*SampleRate/L, where L is the input length, and NENBW is the normalized effective noise bandwidth of the window.
The data type of RBW matches the data type of the input.
MP4 is an extensible container file, meaning that it does not define a strict structure and allows custom structure and hierarchy for each media type. The data in the MP4 file is divided into two sections, the first containing the media-related data and the second containing metadata. The media data contains audio or video and metadata indicate flags for random access, timestamps, etc. The structures in MP4 are typically referred to as atoms or boxes. The minimum size of an atom is 8 bytes(the first 4 bytes specify size and the next 4 bytes specify type). Here is a list of the root level atoms contained in MP files:
ftyp: Contains the file type, description, and the common data structures used.
pdin: Contains progressive video loading/downloading information.
moov: Container for all the movie metadata.
moof: Container with video fragments.
mfra: The container with random access to the video fragment
mdat: Data container for media.
stts: sample-to-time table.
stsc: sample-to-chunk table.
stsz: sample sizes (framing)
meta: The container with the metadata information.
General Complete name : C:\file_example_MP4_480_1_5MG.mp4 Format : MPEG-4 Format profile : Base Media / Version 2 Codec ID : mp42 (mp42/mp41/isom/avc1) File size : 1.50 MiB Duration : 30 s 527 ms Overall bit rate : 411 kb/s Encoded date : UTC 2015-08-07 09:13:02 Tagged date : UTC 2015-08-07 09:13:02
Video ID : 1 Format : AVC Format/Info : Advanced Video Codec Format profile : Baseline@L3 Format settings : 3 Ref Frames Format settings, CABAC : No Format settings, Reference fra : 3 frames Format settings, GOP : M=1, N=90 Codec ID : avc1 Codec ID/Info : Advanced Video Coding Duration : 30 s 33 ms Bit rate : 300 kb/s Width : 480 pixels Height : 270 pixels Display aspect ratio : 16:9 Frame rate mode : Constant Frame rate : 30.000 FPS Color space : YUV Chroma subsampling : 4:2:0 Bit depth : 8 bits Scan type : Progressive Bits/(Pixel*Frame) : 0.077 Stream size : 1.08 MiB (72%) Writing library : x264 core 146 r11M 121396c Encoding settings : cabac=0 / ref=3 / deblock=1:0:0 / analyse=0x1:0x111 / me=hex / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=0 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=48 / lookahead_threads=2 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / stitchable=1 / constrained_intra=0 / bframes=0 / weightp=0 / keyint=infinite / keyint_min=30 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=2pass / mbtree=1 / bitrate=300 / ratetol=1.0 / qcomp=0.60 / qpmin=5 / qpmax=69 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / vbv_maxrate=330 / vbv_bufsize=360 / nal_hrd=none / filler=0 / ip_ratio=1.40 / aq=1:1.00 Encoded date : UTC 2015-08-07 09:13:02 Tagged date : UTC 2015-08-07 09:13:02 Codec configuration box : avcC
Audio ID : 2 Format : AAC LC Format/Info : Advanced Audio Codec Low Complexity Codec ID : mp4a-40-2 Duration : 30 s 527 ms Bit rate mode : Constant Bit rate : 112 kb/s Channel(s) : 2 channels Channel layout : L R Sampling rate : 48.0 kHz Frame rate : 46.875 FPS (1024 SPF) Compression mode : Lossy Stream size : 417 KiB (27%) Encoded date : UTC 2015-08-07 09:13:02 Tagged date : UTC 2015-08-07 09:13:02
