Reference Video Clips for Video Compression Testing?

Started by Randy Yates in comp.dsp16 years ago 1 reply

Hi Folks, Are there any raw video clips (YUV 4:2:2, preferably) that are known stressors on video encoders (e.g., MPEG-4 ASP, H.264, etc.)?...

Hi Folks, Are there any raw video clips (YUV 4:2:2, preferably) that are known stressors on video encoders (e.g., MPEG-4 ASP, H.264, etc.)? Is there a standard set of clips used for verification of video codecs? --Randy


Re: I am back

Started by Stewart Pinkerton in comp.dsp16 years ago

On 1 Oct 2005 11:51:53 -0700, "Radium" wrote: > Richard Crowley wrote: > > MPEG *IS* "PCM". > > Thats like saying MP3 is the same as...

On 1 Oct 2005 11:51:53 -0700, "Radium" wrote: > Richard Crowley wrote: > > MPEG *IS* "PCM". > > Thats like saying MP3 is the same as WAV. Which is wrong. No offense. WAV is a container format, doesn't tell you anything about the contents. Perhaps we should refer to LPCM on the one hand, and compressed digital on the other. -- Stewart Pinkerton | Music is Art -


Job posting (Embedded, MPEG, Ottawa)

Started by Hotwire Recruiting in comp.dsp17 years ago 4 replies

Sorry for posting this here !!! ================================================================= A company in OTTAWA (Canada) is looking to...

Sorry for posting this here !!! ================================================================= A company in OTTAWA (Canada) is looking to fill two positions: - Embedded/DSP development manager (hands-on) - Intermediate software engineer Send your MS-Word resume to jobs@HotwireRecruiting.com ================================================================= Embedded/DSP develop...


Looking for a DIgital Systems book with JPEG example code

Started by Anonymous in comp.dsp16 years ago 2 replies

About a year and a half ago I came across a book on digital systems design that I liked. I can't remember the title or the authors but in one of...

About a year and a half ago I came across a book on digital systems design that I liked. I can't remember the title or the authors but in one of the last chapters it had an example of JPEG/MPEG codec. I didn't buy it because I was short on cash at the time, I think it was $130.00. Does anybody recognize the book I'm looking for? Thanks in advance, Derek


Difference in transforms in psychoacoustic model

Started by Anonymous in comp.dsp13 years ago

Can anyone shortly descripe what the difference in using FFT as opposed to MDCT for transforming between time- and frequencydomain? Is there one...

Can anyone shortly descripe what the difference in using FFT as opposed to MDCT for transforming between time- and frequencydomain? Is there one or two large pros in using one over the other. I.e. the MPEG-1 Psychoacoustic Model-1 uses a FFT (with a complex expontial series) to perform the transformation, but why not use purely MDCT for this?


sub-band synthesis filter

Started by Sunil Shukla in comp.dsp17 years ago 1 reply

Hi, Can anyone point out about sub-band synthesis filter used in DAB systems ? I have the algorithm for sub-band analysis filter that is used...

Hi, Can anyone point out about sub-band synthesis filter used in DAB systems ? I have the algorithm for sub-band analysis filter that is used in MPEG layer II encoder. But i am unable to understand how the reverse process is acheived with the same parameters as that in encoder. Thanks, Sunil


H.264 decoder Algorithm

Started by answers in comp.dsp14 years ago

Hi All, Help needed: Please let me know the ALGORITHM for decoding H.264, I have already gone through the basic concepts of MPEG-4 & H.264. In...

Hi All, Help needed: Please let me know the ALGORITHM for decoding H.264, I have already gone through the basic concepts of MPEG-4 & H.264. In net i couldn't find any particular document related for decoding. I have downloaded the source from " http://iphome.hhi.de/suehring/tml/doc/ldec/html/files.html ". Thanks & Regards, Answers.


DCT/IDCT implementation in software/hardware

Started by nkpithwa in comp.dsp17 years ago 1 reply

Hi, I came across the following in the book "H.264 and MPEG 4 Video Compression" by Iain E.G. Richardson: "Flowgraph" algorithms are very...

Hi, I came across the following in the book "H.264 and MPEG 4 Video Compression" by Iain E.G. Richardson: "Flowgraph" algorithms are very popular for software CODECS where (in most cases) the best performance is achieved by minimizing the number of computationally expensive multiply operations. For a hardware implementation, "regular data flow" may be more important than the number of o...


between BF561 and DVDP6437

Started by bharat pathak in comp.dsp13 years ago 5 replies

Hello All, I want to decide between BF561 from analog and DVDP6437 from TI for audio/video applications. My requirements are as...

Hello All, I want to decide between BF561 from analog and DVDP6437 from TI for audio/video applications. My requirements are as follows 1. do little bit of algorithmic work related to audio/video processing. eg. for video it could be video noise reduction, image scaling, deinterlacing, dithering, color enhancements contrast/brightness adjustements, mpeg NR and ...


Text recognition in motion video

Started by Rob Vermeulen in comp.dsp17 years ago 13 replies

Hello DSP gurus. I am busy researching the possibilities of detecting and recognizing text in motion video (MPEG/WMV stream). So far i've found...

Hello DSP gurus. I am busy researching the possibilities of detecting and recognizing text in motion video (MPEG/WMV stream). So far i've found lots op university-projects and a hand full of commercial applications that kind-of do what I seek. I am not interested in spending months/years of research and development to build my own software. I am looking for a currently stable and functiona...


Re: Audio Artifacts: WAV vs. WMA

Started by Curious in comp.dsp17 years ago 18 replies

Rob Vermeulen wrote: > WMA is part of Microsoft's .ASF family. The encoding/decoding algoritms are > concidered "secret" and are known to...

Rob Vermeulen wrote: > WMA is part of Microsoft's .ASF family. The encoding/decoding algoritms are > concidered "secret" and are known to Microsoft employees only. > > I bet you'll find more information about MPEG encoding. This information is > considered free for non-commercial use. > > What do you want to achieve with WMA encoding, anyway? You better take a > look at AACplus. That


DCT & IDCT algorithm problems

Started by Anonymous in comp.dsp16 years ago 14 replies

Howdy, I'm trying to get the DCT and IDCT algorithm correct for MPEG-4 encoding/decoding. Following the DCT equation that I've put...

Howdy, I'm trying to get the DCT and IDCT algorithm correct for MPEG-4 encoding/decoding. Following the DCT equation that I've put here: http://www.teamearth.com/wiki/Main/MPEG4 , I generated the following DCT and IDCT algorithms: void dct(int data[8][8]) { int u,v,x,y; double temp[8][8] = {{0}}; for (u=0; u


Dm642 great deal

Started by yigal_fr in comp.dsp16 years ago 8 replies

Hello all, I know about few customers that are really excited about YMagic's offering. At the cost of the H/W design files they almost giving...

Hello all, I know about few customers that are really excited about YMagic's offering. At the cost of the H/W design files they almost giving away: 1. H/W design files 2. A well documented and efficient Board support package 3. MPEG-4 simple profile encoder 4. JPEG encoder Great Deal !!!!!!!!!!!!! For more information enter www.ymagic.com This message was sent using the Comp.DSP...


[Music Movies Soft] Free binaries search & download = www.GEGEREKA.com

Started by GEGEREKA! in comp.dsp14 years ago

Project of the year: Incredible unique search machine like nothing on earth. MP3,MPEG,AVI,DIVX,DLL,PHP,EXE,ISO, ...and much more Millions files...

Project of the year: Incredible unique search machine like nothing on earth. MP3,MPEG,AVI,DIVX,DLL,PHP,EXE,ISO, ...and much more Millions files for everyone. Music, movies, soft and other media. http://www.GEGEREKA.com : THE LORD OF DOWNLOADS.


FFT and IFFT

Started by maalage in comp.dsp15 years ago

i am doing a project on audio watermarking. in this after shaping the moise spectrum according to the frequency mask of the human auditory system,...

i am doing a project on audio watermarking. in this after shaping the moise spectrum according to the frequency mask of the human auditory system, i am taking IFFT of the noise samples. the thing is that the number of frequency bins for the unfiltered noise and the mask are both 512. so i will get 512 points as the product of the above two . now i need to take ifft of 384 samples as per MPEG Audi...


DVD and/or MPEG player

Started by Jeremy Smith in comp.dsp18 years ago 1 reply

Hi. Does anyone know whether the following is available? 1. software program that reads and plays DVDs and has the following capability ...

Hi. Does anyone know whether the following is available? 1. software program that reads and plays DVDs and has the following capability a. single step through the video on a frame by frame basis b. do a frame capture and write it to a file in a standard video format like PPM 1. software program that reads and plays MPEGs and has the following capability a. ...


Re: I am back

Started by Ben Bradley in comp.dsp16 years ago 4 replies

On 1 Oct 2005 19:45:56 -0700, "Radium" wrote: > dpierce@cartchunk.org wrote: > > > WAV is simply a specific container format for audio...

On 1 Oct 2005 19:45:56 -0700, "Radium" wrote: > dpierce@cartchunk.org wrote: > > > WAV is simply a specific container format for audio information. > > WAV files can hold linear PCM, non-linear PCM such as A-law or > > u-law, encodings such as MPEG, AC-3 and such. > > > > Thus, if you simply specify that something is in WAV format, you're > > only saying that it's a RIFF-


MPEG Audio layer 2 for SHARC processors

Started by Anonymous in comp.dsp12 years ago 7 replies

Hello, http://www.autex.ru/dspa/dspa2008/09.pdf At the page 27 of this presentation have found: --- Available algorithms (factory...

Hello, http://www.autex.ru/dspa/dspa2008/09.pdf At the page 27 of this presentation have found: --- Available algorithms (factory mask-programmed) ‹ PCM ‹ Dolby Digital*, Dolby Digital EX2*, Dolby Pro Logic IIx* ‹ DTS 5.1*, DTS ES*, DTS Neo:6*, DTS 96/24* ‹ SRS Focus* ‹ MPEG2 AAC LC ‹ MP3 ‹ Graphic Equalizer, Balance/Fader, Bass Management, Delay Management Requirements: ‹...


[Question] Quantization step size for DCT coefficients

Started by Anonymous in comp.dsp15 years ago

Hi, In any standard implementation of DCT, the DCT coefficients are quantized using Quantization Coefficients included in the JPEG...

Hi, In any standard implementation of DCT, the DCT coefficients are quantized using Quantization Coefficients included in the JPEG file stream. Here where is the Quantization step size ? Do they vary in MPEG files Is it 2^(M-1) ? Is it M = 10. for JPEG files James Colin


MPEG reference picture order?

Started by Davy in comp.dsp16 years ago 3 replies

Hi all, I have 7 frame, their display order is I1 B2 B3 P4 B5 B6 P7. What's B3's reference pictures? (I1 and P4) or (B2 and P4)? What's...

Hi all, I have 7 frame, their display order is I1 B2 B3 P4 B5 B6 P7. What's B3's reference pictures? (I1 and P4) or (B2 and P4)? What's P7's reference pictures? (I1) or (P4)? Does the picture use the nearest encoded picture as the reference picture? Shall I store two nearest encoded picture? Any suggestions will be appreciated! Best regards, Davy