TI DM642 Video Capture or I2C initialization problem

Started by Matthias in comp.dsp14 years ago 1 reply

Hi, I am trying a simple video loop through application using the EVM DM642 from Spectrum Digital. (EVM v3 with TI decoders, CCS 3.1, DSP/BIOS...

Hi, I am trying a simple video loop through application using the EVM DM642 from Spectrum Digital. (EVM v3 with TI decoders, CCS 3.1, DSP/BIOS 5.2) As far as I can tell my code as well as the DSP/BIOS configuration is identical to the samples provided. Unfortunately, the program hangs during the start up phase, either during EVM_init() or in the capture task during the first call to FVI...


correlating rotated images with perspective

Started by Adam Chapman in comp.dsp13 years ago

Hi, I'm trying to make a vision-guided robot aircraft at uni and I want it to land on an 'H' shaped marker on the ground. The aircraft will...

Hi, I'm trying to make a vision-guided robot aircraft at uni and I want it to land on an 'H' shaped marker on the ground. The aircraft will only use the information from its mounted video camera to navigate. I have been looking into ways of identifying the helipad seen in the video, which will be rotated, scaled and have perspective. These properties will be used to determine the orie...


video info below the carrier in analog channel?

Started by dtsao in comp.dsp12 years ago 6 replies

Hi, in an analog channel, I know the video carrier is 1.25 Mhz above the bottom of the channel. Also the color and audio info are 3.58Mhz and...

Hi, in an analog channel, I know the video carrier is 1.25 Mhz above the bottom of the channel. Also the color and audio info are 3.58Mhz and 4.5 Mhz above this video carrier. But I wonder, is there any info below the carrier, between the bottom of the channel and the 1.25Mhz? My guess is no, but I'm not sure.


Video-equivalent of "pitch-shifting."

Started by Radium in comp.dsp13 years ago 48 replies

Hi: I started a new thread because the previous one started to go into tangent of digital vs. analog but was filled with emotions...

Hi: I started a new thread because the previous one started to go into tangent of digital vs. analog but was filled with emotions and personal vendettas rather than science and logic. So I changed the thread. Anyways, Adobe Audition and voice-changers allow the frequencies of an audio signal to be shifted w/out low-pass filtering or changing the tempo. There are two video-equivalents of...


Recovering data (TMS320DM642)

Started by jerome in comp.dsp15 years ago 3 replies

Hi, Soon i will implement a video compression algorithm on DM642. I'd like to recover the compressed data, which will be stored in SDRAM,...

Hi, Soon i will implement a video compression algorithm on DM642. I'd like to recover the compressed data, which will be stored in SDRAM, in order to be able to replay the video on the PC. Can you tell me if Code Composer allows us to recover data stored in external memory and to save them in a file on the PC ? Does RTDX allow to do that ? Could you point me to some example codes ? ...


Real Time Video Rotation Using An FPGA.

Started by Alabama Engineer in comp.dsp15 years ago 2 replies

I would like recommendations on which FPGA to use (Xilinx vs. Altera vs. Actel) in an application which rotates a 640x480 real time video frame....

I would like recommendations on which FPGA to use (Xilinx vs. Altera vs. Actel) in an application which rotates a 640x480 real time video frame. I would also appreciate any pointers on rotation algorithms that I could use for this. Thanks in advance for all your help.


HPPCI + ADSP-BF533 EZLITE + Video: Problems

Started by in comp.dsp15 years ago 2 replies

Hi, I'm trying to run a small demonstration aplpication on which I capture images from a camera trough the video codec on the...

Hi, I'm trying to run a small demonstration aplpication on which I capture images from a camera trough the video codec on the ADDS- BF533-EZLITE (rev 1.1, silicon rev 0.1). This behavior happens both with VisualDSP++ 4.0 and 3.5 Nov'04 update, and if using HPPCI emulator: The program loads fine. I can start to run it. But the PPI interrupt never comes back. If I try to halt the DSP, I...


2D image scaling using cascaded polyphase FIR filter

Started by michaelle in comp.dsp14 years ago 2 replies

Hi, When looking at many of the video scalers and DSPs for consumer video, the datasheets usually list several cascaded polyphase FIR filters. ...

Hi, When looking at many of the video scalers and DSPs for consumer video, the datasheets usually list several cascaded polyphase FIR filters. They usually supply software libraries that generate the filter coefficients given a pair of numbers describing how much interpolation and decimation. In attempting to get a much better understanding of basic DSP skills, I started to build my own mod...


Text recognition in motion video

Started by Rob Vermeulen in comp.dsp16 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: OT: The Truth About Predator Drones

Started by Archimedes' Lever in comp.dsp11 years ago 9 replies

On Thu, 17 Dec 2009 22:09:31 -0800 (PST), David Schwartz wrote: > Cannot be done. The satellite that the predator talks to only supports >...

On Thu, 17 Dec 2009 22:09:31 -0800 (PST), David Schwartz wrote: > Cannot be done. The satellite that the predator talks to only supports > analog video. Are you sure? General instrument was able to digitize, compress, and send no less than 12 standard 6MHz wide analog video signals up to a bird that was only for analog TV signals, and they effectively increase


Conversion of Single Photo to 3D to Video -- Trial Runs

Started by Anonymous in comp.dsp5 years ago 9 replies

This is a short video segment showing some trial runs at an early stage in the development...

This is a short video segment showing some trial runs at an early stage in the development process: http://www.youtube.com/watch?v=mUEiiVFqVww One set of segments takes place over Chicago, the other around Mount Rushmore. Since it's only a first trial run (basically to see how far one can move in different directions before distortion sets in), the images were reprojected at redu


[Job Opportunity] DSP Video Engineer in Hackensack, NJ

Started by Oliver in comp.dsp13 years ago

Hello All, Please forgive my interruption to the technical discussion. I came across this user's group, and wanted to get the word out...

Hello All, Please forgive my interruption to the technical discussion. I came across this user's group, and wanted to get the word out about a full-time opportunity as a Senior DSP Engineer, with my direct client in Hackensack NJ. Our client, one of the first to make deployment of high definition (HD) video conferencing widely available over the internet, creates solutions th...


TMS320DM642 8bit QDMA transfers and subsampling

Started by Mark Robinson in comp.dsp15 years ago 5 replies

Hi all. I'm using a DM642 to capture a PAL frame from a video port as 8 bit YCbCr. I want to subsample this frame by half, but I can't use...

Hi all. I'm using a DM642 to capture a PAL frame from a video port as 8 bit YCbCr. I want to subsample this frame by half, but I can't use the video port scaler because I need the full frame too. I tried this using 8 bit QDMA transfers set up as indexed source/incremented dest. The problem is that this is the probably the most inefficient use of the EDMA engine possible, and the whole th...


High end dsp chips

Started by Alex Gibson in comp.dsp15 years ago 3 replies

Having to do a comparison and presentation on available high end chips and technologies for video / sensor networks. Have to process the video...

Having to do a comparison and presentation on available high end chips and technologies for video / sensor networks. Have to process the video / sensor data at sensor location to minimise network traffic. Already working with Ti TMS320C6713(Lyrtech and DSK) , C6711DSK and Cradle CT3400 chips. Getting access to a C6455 device. Have to get a list together with basic feature set , ea...


perdita di sincronismo audio video su nero vision

Started by Anonymous in comp.dsp15 years ago 1 reply

ho importato un file avi esportato da adobe premiere 1.5 ed ho creato il file immagine da poter mettere su dvd. il bitrate e' alto...

ho importato un file avi esportato da adobe premiere 1.5 ed ho creato il file immagine da poter mettere su dvd. il bitrate e' alto 8550...e faccio pure il procedimento a doppia passata ma il risultato finale e' una perdita di sincronismo audio video di circa 7sec. !!!!!!!!!!!! aiuto!!


Image/video processing/enhancement tool

Started by Image in comp.dsp12 years ago 5 replies

Is there a free tool for Matlab based (or other) for doing image/video enhancement: 1. Zooming in using various interpolation (bi-cubic...

Is there a free tool for Matlab based (or other) for doing image/video enhancement: 1. Zooming in using various interpolation (bi-cubic etc.), 2. image enhancement using spatial correlation, 3. image enhancement using succeeding images series. Thanks, IM


Matlab code for MPEG/h.264 video encoding and decoding

Started by chaitanya in comp.dsp13 years ago

Hi I am in need of a MPEG/H.264 codec in matlab. I want to play with the compressed bitstream i.e. headers , motion vectors ,VLCs etc. I need...

Hi I am in need of a MPEG/H.264 codec in matlab. I want to play with the compressed bitstream i.e. headers , motion vectors ,VLCs etc. I need to convert a video into mpeg bitstream .... and then put my watermark in this compressed domain. It would be great if anyone could provide a solution(preferably in matlab) for the above .... Thanks and regards chaitanya


How does any video codec get the its input frame?

Started by tommy in comp.dsp14 years ago 1 reply

I am beginner studying the videco codec. So I am sorry in case of I may have stupid question. On my way to study the H.263 video coder, I have...

I am beginner studying the videco codec. So I am sorry in case of I may have stupid question. On my way to study the H.263 video coder, I have question how encoder processes the frame from A/D converter. I imagine like that. After raw image signal(R,G,B) from A/D converter, color mapping is performed.( convert RBG to YCbCr) one frame store the buffer and then it is encoded. Simultaneously...


Audio vs Video

Started by Vladimir Vassilevsky in comp.dsp13 years ago 12 replies

Just an observation: the largest part of a modern computer game is the library of the miscellaneous sound samples. Announcements, dialogs,...

Just an observation: the largest part of a modern computer game is the library of the miscellaneous sound samples. Announcements, dialogs, nature, music, etc. Isn't it strange that the video part of a game is produced by the real time rendering of some kind of a simple model of the reality, whereas the audio is stored as the samples of the live sounds? Why the fairly sophisticate...


Need help on video decoder chip specification

Started by Steve in comp.dsp16 years ago 8 replies

Hi there, I need help in understanding a group of video decoder chip specifications. Let me use TI's TVP5146 as an example. The first thing I...

Hi there, I need help in understanding a group of video decoder chip specifications. Let me use TI's TVP5146 as an example. The first thing I want to know is the output digital data rate. On the spec, it says: Four 10-bit, 30-MSPS A/D converters with analog preprocessors ...; Single 14.31818MHz reference crystal for all standards. But doesn't mention the output data rate. I guess eithe...