drmpeg

10 ms·

91.
by drmpeg 2y ago
The other problem it solves is the complex transmission required. Diesel-Hydraulic locomotives were built, but were not successful long term. The most famous is the Krauss-Maffei ML4000, built for the Southern Pacific railroad. https:&#x2F
92.
by drmpeg 2y ago
Looks good to me even on Netscape 4.7. https://www.w6rz.net/netscape.png
93.
by drmpeg 2y ago
My homage to Solaris as an iPhone wallpaper. https://www.w6rz.net/solaris_iphone.png https://www.w6rz.net/solarisios.png
94.
by drmpeg 2y ago
The i960CA and CF had branch hints. It was bit 1 in the branch and the compare and branch opcodes.
95.
by drmpeg 2y ago
SPARC has delay slots. Here's some code. The clr %o3 and restore %o0 are in the delay slots. 10082410 9de3bf98 save %sp, 0xffffff98, %sp 10082414 90102001 mov 1, %o0 10082418 92100018 m
96.
by drmpeg 2y ago
Here's a high resolution version. 2 MHz wide OFDM. https://www.youtube.com/watch?v=saac0ZtTeX4 https://github.com/drmpeg/gr-paint
97.
by drmpeg 2y ago
No, that has nothing to do with OFDM.
98.
by drmpeg 2y ago
Yes, that's the one. I also have a more useful OFDM project, an ATSC 3.0 transmitter. https://github.com/drmpeg/gr-atsc3
99.
by drmpeg 2y ago
Stupid OFDM tricks. https://www.youtube.com/watch?v=saac0ZtTeX4
100.
by drmpeg 2y ago
Spectrogram of 902-928 MHz here in Silicon Valley with just an indoor antenna. Tons of power and gas meters pinging away. https://www.youtube.com/watch?v=GK60cMsBaFo Make sure to switch to 1080p.
101.
by drmpeg 2y ago
Here's the Github repo. https://github.com/emidan19/deep-tempest
102.
by drmpeg 2y ago
Time flies. It was actually April 2000, 24 years ago.
103.
by drmpeg 2y ago
Here's a video that shows the concept. Each frame shows the allowable colors for a particular brightness in Rec. 709 YCbCr space. https://www.w6rz.net/chromacity.mp4
104.
by drmpeg 2y ago
Ian Cutress video. https://www.youtube.com/watch?v=Fa2GS86_cx8
105.
by drmpeg 2y ago
Here's an old video that I have. The timestamp is long gone, but I know it's from 1997 +/- a year. It's MPEG-1 with no sound. We were clowning around on the lab, testing a new encoder. Check out the SPARCStation 20 in th
106.
by drmpeg 2y ago
Yes, from 1993 until I retired in 2011. I worked at C-Cube Microsystems and LSI Logic. In 1993-1994 at C-Cube, I helped develop the first real-time MPEG-1 encoder. The rest of the team was busy developing the 704x480 resolution encoder for
107.
by drmpeg 2y ago
She should say "helped to invent". Video codec standard development is most definitely a group effort.
108.
by drmpeg 2y ago
> I wish that chart went further back to see if there is a greater cycle at play. There is a chart of all observed cycles on the same website. http://www.solen.info/solar/cycles1_to_present.html
109.
by drmpeg 2y ago
WiFi is at 2.4 GHz. LTE band 30, satellite radio (XM/Sirius) and aeronautical telemetry all exist between the deep space downlink at 2290 to 2300 MHz and WiFi at 2400 MHz.
110.
by drmpeg 2y ago
None of the companies I've worked for exist today. Even some of the buildings are gone. I worked at 1188 Bordeaux in Sunnyvale (at a kooky company called Microtest where I used to smoke weed with the CEO and CFO), and now it's bee
111.
by drmpeg 2y ago
This page says 50 MHz. https://github.com/rejunity/z80-open-silicon/blob/main/docs/...
112.
by drmpeg 3y ago
And ATSC 3.0 will also be using VVC. https://prdatsc.wpenginepowered.com/wp-content/uploads/2024/...
113.
by drmpeg 3y ago
Here's the Brazil website. https://forumsbtvd.org.br/tv3_0/ And their video codec testing. https://forumsbtvd.org.br/wp-content/uploads/2024/03/SBTVD-T...
114.
by drmpeg 3y ago
The FCC doesn't test the transmitter. The device is only tested to comply with Part 15 unintentional radiation rules (just like any other consumer electronics device).
115.
by drmpeg 3y ago
For UHF television stations, the effective radiated power (ERP) is typically 1 Megawatt. That is accomplished (for example) with a 57 kilowatt transmitter and an antenna with 12.44 dB gain.
116.
by drmpeg 3y ago
Some much larger fines have been levied recently. https://www.fcc.gov/document/fcc-fines-three-pirate-radio-op... https://www.fcc.gov/document/fcc-proposes-35-million-fines-m... https:/&#x2F
117.
by drmpeg 3y ago
Slideshow "UltaHD over ATSC 1.0" from station owner Anton Kapela. https://docs.google.com/presentation/d/1hysslJsp6rTYkWuOmDBK...
118.
by drmpeg 3y ago
I worked on one of the first dual core processors when I was at C-Cube Microsystems way back in 2000. It was an SoC with two microSPARC cores. One core was a general purpose processor for system functions running VxWorks and the other core
119.
by drmpeg 3y ago
With SDR, you can paint an image into the receiver waterfall with OFDM. https://www.youtube.com/watch?v=saac0ZtTeX4 (be sure to switch to 1080p) https://github.com/drmpeg/gr-paint
120.
by drmpeg 3y ago
The glibc times were reported on the RISC-V IRC channel by davidlt. Here's the backlog for that day. https://libera.irclog.whitequark.org/riscv/2024-02-02 The stress-ng benchmark was suggested the previous day. h

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