drmpeg

6 ms·

1.
by drmpeg 24d ago
I still have my DC280. 1760x1168. Here's a sample (from the Jaques Littlefield tank collection). https://www.w6rz.net/DCP_1004.JPG
2.
by drmpeg 1mo ago
In 1981, my first job in Silicon Valley was obtained by answering a blind (no company name) ad in the Mercury News. It was a kooky company that built burn-in ovens for semiconductors (mostly 2164 memory chips back then). I had a lot of fun
3.
by drmpeg 2mo ago
I'll never forget Dennis Erectus on KOME 98.5 (the wet spot on your dial) in 80's Silicon Valley.
4.
by drmpeg 2mo ago
For sure. Just YouTube alone is a vast ocean of H.264 bits.
5.
by drmpeg 2mo ago
MPEG-2 video is still very much alive. In the US, almost all terrestrial OTA broadcast (ATSC 1.0) and all SD channels on cable systems. Even Comcast VOD was all MPEG-2 (including HD) until they shut down the QAM version in 2023.
6.
by drmpeg 3mo ago
I was the project engineer for the Air Force Space Command / NORAD DSP satellite ground network back in the 80's. The system used the 10MB 8" Bernoulli drive and cartridges to store the early warning message traffic. The syst
7.
by drmpeg 3mo ago
Advanced Television Systems Committee. It's the US standards organization for terrestrial digital television. ATSC 3.0 is a new standard that's very similar to DVB-T2 (used in the UK for HDTV) at the PHY layer.
8.
by drmpeg 3mo ago
Little known Fabrice Bellard project. He worked with the ATSC to test the ATSC 3.0 PHY layer when he was consulting at DekTec.
9.
by drmpeg 4mo ago
The article kind of disses the Intel 8085. For those of us with 8080 code bases that were never going to be rewritten for the Z80, it was a welcome upgrade. On the paper dryer process control systems I was working on in 1979, the 8085 based
10.
by drmpeg 4mo ago
Looks like the esp4 and esp6 fixes have been pushed for 7.0, 6.18, 6.12 and 6.6 kernels. https://lore.kernel.org/lkml/2026050851-iron-hurdle-6421@gre... https://lore.kernel.org/lkml/2026050843-unpl
11.
by drmpeg 5mo ago
Previous post. https://news.ycombinator.com/item?id=45790672
12.
by drmpeg 6mo ago
It's actively being maintained by Takashi Sakamoto. Here's the commit for Linux 7.0-rc1. https://github.com/torvalds/linux/commit/0d6dd4738dbcc32b60c...
13.
by drmpeg 6mo ago
Meyer lemons from my backyard. https://www.w6rz.net/lemons.png
14.
by drmpeg 8mo ago
Here's an emulation of WWV I did with a transmit capable SDR. https://www.youtube.com/watch?v=9LsJn0CyyZI
15.
by drmpeg 8mo ago
VSB came later. From https://www.tvtechnology.com/opinions/hdtv-from-1925-to-1994 In the United States in 1935, the Radio Corporation of America demonstrated a 343-line television system. In 1936, two committees of the
16.
by drmpeg 8mo ago
Although everyone is interested in visible aurora, the proton flux is also really impressive. It peaked at 37,000 pfu at 1910Z. The highest ever recorded was 43,500 pfu in March 1991.
17.
by drmpeg 8mo ago
VistaVision has made a comeback with "The Brutalist", "One Battle After Another" and "Bugonia". https://en.wikipedia.org/wiki/VistaVision
18.
by drmpeg 9mo ago
Here's some captures from my Comcast system here in Silicon Valley. https://www.w6rz.net/528x480.ts https://www.w6rz.net/528x480sp.ts
19.
by drmpeg 9mo ago
> Videos with non-square pixels are pretty rare... Before HD, almost all video was non-square pixels. DVD is 720x480. SD channels on cable TV systems are 528x480.
20.
by drmpeg 9mo ago
There's some thought that Ukraine could become a tech hub after the war due to their drone technology.
21.
by drmpeg 9mo ago
Here's my ATSC 3.0 transmitter in C++. https://github.com/drmpeg/gr-atsc3
22.
by drmpeg 9mo ago
Here's the Emmy that C-Cube Microsystems won back in 1995 for the MPEG-2 (actually unconstrained MPEG-1) encoder chip set used in the roll-out of DirecTV. https://www.w6rz.net/DCP_1235.JPG The original DirecTV encoder
23.
by drmpeg 9mo ago
I believe he's using a 6m antenna at the Allen Telescope Array (ATA).
24.
by drmpeg 10mo ago
The first 16:9 content I ever saw was the trailer to "Batman Forever" (with Val Kilmer) in 1995 when I was working at C-Cube Microsystems. The studios use to send them test content all the time for video compression testing. It wa
25.
Tenstorrent QuietBox Tested(theregister.com)
4 points by drmpeg 10mo ago|0 comments
26.
by drmpeg 10mo ago
Yes, you have it correct. However, predicting the effects of solar flares is very difficult. Not only does the particle stream have to hit the Earth, it has to couple with the magnetic field. Large flares can cause small events on Earth and
27.
by drmpeg 10mo ago
The CME from the X5.1 flare has not arrived yet. Here are the websites I use: https://www.swpc.noaa.gov/ https://www.swpc.noaa.gov/communities/space-weather-enthusia... https://www.spaceweat
28.
by drmpeg 10mo ago
A severe geomagnetic storm is starting now (November 12 0000Z). But it's from the previous X-flares (X1.7 and X1.2), not the X5.1 flare.
29.
by drmpeg 10mo ago
A lightly coded (13/15 LDPC) 256QAM OFDM signal at 40 MHz wide could do 250 Mbps. Or 31.25 million bytes per second if you prefer. This would be for a point to point terrestrial link. OFDM probably wouldn't work for EME (at any po
30.
by drmpeg 10mo ago
Will you have arrays with the opposite antenna polarity for point to point links? That is, LHCP (Tx), RHCP (Rx) instead of RHCP (Tx), LHCP (Rx).

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