this should be used as a copypasta somewhere

ATSC 1.0 has at least two very dumb things about it. #1: The 8VSB modulation. 8VSB is basically amplitude modulation with, spectrally, everything below the carrier attenuated off. In theory, that sounds ok, except that it’s extremely vulnerable to multipath. GUESS WHAT HAPPENS ON EVERY TV SIGNAL IN AN URBAN AREA. The margin’s not that big for multipath, and once you hit it, the whole signal’s useless, leaving your viewers to dance around with the antenna and wonder why they just can’t get picture….
8VSB was only, from documentation I’ve found on it, lab tested for performance in terms of signal to noise ratio in a proof for the FCC… no attempt was made to simulate or measure receiver performance in the face of multipath. I’m not sure if this was because nobody ever had the “aha!” moment and realized it’d be a problem or if some vendor already heavily invested in it swept it under the rug. Just about every other country used DVB-T which allows for more spectrally efficient and robust modulation standards including QPSK (very robust but not as efficient as QAM), 16QAM, and 64QAM.
This raises another issue that was dumber on the broadcaster’s side: 8VSB was in part chosen because it would, in theory, work through existing analog transmitters, requiring only slight modifications to things like the combiners and an exciter swap. In practice, no transmitter manufacturers really opened this up as an option, and everyone had to buy all new shit. In fact… the klystron based UHF television transmitters proved not to have the linearity (or SOMETHING) to deal with 8VSB and the Inductive Output Tube had to be brought out of mothballs to deal with it. The IOT has great linearity but no damn efficiency – it was originally used by General Electric for an early World’s Fair demo of UHF television broadcasting, but commercially never took off… anyway, later on, EEV’s esciot series tubes improved on that somewhat… but… they’re still a pain in the arse
Stupid Thing #2 (or is it about #8 by now?): MPEG2. Do I look like I know what an mpeg is?*
So here not only do we have this shitty 8VSB modulation sapping the available amount of information that can be broadcast in a certain width of channel but then…. MPEG2 video coding was specified. I suspect that’s evidence of the standard’s development either being dragged out forever OR someone just wanted to be able to use up a bunch of DVD player decoder ASICs they had sitting in a Chinese warehouse. As a result of the MPEG2 encoding being used, the picture looks like DOUBLE BUTT when there’s a lot of motion, especially when you’re running a lot of subchannels squeezed into that 18.3 megabits/sec…
And then you have the whole godawful thing where the CECB program led to the cost of converter boxes which probably actually cost about $25 including hardware, manufacturing, and patent licensing royalties being fixed right up to $40…. but that’s a far dumber story
* https://www.youtube.com/watch?v=j5nZhf8SjXw

ATSC 1.0 has 💹👩 at 😂☺ least two very ❗😔 dumb 👅🤤 things about 🏻👏 it. 💡😏 #1: ⏰🤜 The 8VSB modulation. 8VSB is basically amplitude modulation with, spectrally, everything below ⬇😫 the carrier attenuated off. 📴 In 👏 theory, 🍆 that 😦 sounds 👌👌 ok, 🆗 except 😮😮 that 👈 it’s 💯❗ extremely 💯💯 vulnerable to 😄 multipath. GUESS 😦 WHAT HAPPENS ON 😢🔛 EVERY 🏾 TV 📺📺 SIGNAL IN 🍑 AN 😮👏 URBAN AREA. The margin’s not 🚫 that 👶➡ big for multipath, and ☢🍆 once ⁉🍆 you ☝ hit it, 😵 the 🙆 whole signal’s useless, ⏳ leaving 🏃🏃 your 💯💦 viewers to 💰🎯 dance 💃💃 around 😇💦 with 👏 the antenna and 👏 wonder why they just can’t 💦🔫 get picture…. 📷💭 8VSB was only, 🔑 from 😂 documentation I’ve 💰👈 found on 🔛 it, lab tested for 🎁 performance in terms of signal to 💦 noise ratio in a proof 💯💯 for 🍆🍆 the 💰👏 FCC… 🚫 no 🚫🙅 attempt was 👍👏 made to 💨 simulate or 💁 measure 🎛🎛 receiver performance in the 🏳👏 face of multipath. I’m not 🙅 sure if 👉👏 this 💦👈 was because 📝♂ nobody 🙅 ever had 💦 the “aha!” moment 🕞🕑 and 👏 realized it’d ❓🍝 be 💨😐 a problem or 👱👱 if 🙎🅱 some 💛 vendor already heavily 😃😃 invested in 🏽🙌 it swept 🤣🤣 it under ⏬ the 🅰 rug. Just 😬😶 about 😯 every 👏👖 other country 😂🏃 used DVB-T which 👏 allows for 😏 more spectrally efficient and 💦 robust modulation standards including 💨 QPSK (very ☣👿 robust but not 👮 as efficient as 🏃🍑 QAM), 16QAM, and 💩 64QAM. This 👈⬆ raises another 🏻 issue that 😠👌 was dumber on 👋🔛 the 👨 broadcaster’s side: 8VSB was in ❤ part chosen because it 💯 would, in theory, 😂 work 🏃😠 through 🚪 existing analog transmitters, requiring only 🏻☝ slight modifications to 💥💦 things 🕑 like 🙅 the 🚑🚪 combiners and 👀👅 an exciter swap. In 🌤😩 practice, 🍆 no transmitter manufacturers really 🏳👄 opened 😅😅 this ⬆ up ❤🏿 as 🍑 an option, and ➕ everyone had 👞 to 💰😛 buy all 😎 new 🎆🏽 shit. 👌 In fact… 🛡🔍 the 💦 klystron based UHF television transmitters proved not ❌🚫 to 🆒😤 have 😎 the ♀👏 linearity (or 🅱🅱 SOMETHING) 🤔❓ to deal with 👫 8VSB and the 📺 Inductive Output Tube 🙈🐱 had ☝🈶 to be brought out 👿 of mothballs to 🔣 deal with it. ✔ The IOT has 💰💹 great linearity but 🍑 no damn 😩 efficiency – it was originally 🔙 used 🚟 by General ♂ Electric ⚡⚡ for 💕❓ an 💶 early 🕐 World’s Fair demo of UHF television broadcasting, but 🍑 commercially never ❌😤 took 😱 off… anyway, later ⏰💯 on, 🍆 EEV’s esciot series tubes improved on that somewhat… but… ✋🍑 they’re 😄 still 👉 a 📖🎯 pain in 🛌 the 👏📖 arse Stupid Thing #2 💁 (or 💀 is it 😡😩 about #8 👊 by 😈👊 now?): MPEG2. Do 👌 I 👁 look like I know what an 👌👹 mpeg is?* So here 👏⤵ not only do 👌 we have 👏🈶 this ⁉ shitty 8VSB modulation sapping the 👑 available amount 📉 of information that can 💦♀ be broadcast in a 🍑 certain width of channel 👀 but then…. 👱🅱 MPEG2 video coding was 😰🙂 specified. I 🏿🔥 suspect that’s 😐 evidence 📰📰 of 👌💦 the 👏 standard’s development 🔬🔬 either being 😑 dragged out forever OR 💦💦 someone just 👏🤔 wanted 🅰 to be 🐝💰 able to 💦 use 👏 up 🔝😍 a bunch of ❗ DVD player 💰🤺 decoder ASICs they 😂👥 had 🍆 sitting 🙇 in a Chinese 😕😕 warehouse. As 🍑 a 💰💰 result of 😴💦 the MPEG2 encoding being used, 🚟 the 😬 picture 💩 looks like DOUBLE BUTT 😍 when 🍑😩 there’s a 👌👌 lot ‼ of 💿😏 motion, 😐 especially when 🍑 you’re 🔥🏃 running 🏃 a 👦 lot 🍑 of subchannels squeezed into that 🏻🙇 18.3 💋 megabits/sec… And 😤🚄 then you 👈👧 have the 🎁👏 whole 💦👩 godawful thing where 😭😠 the 😈🏻 CECB program led to the 🍗 cost of 🚋💦 converter boxes which 🥙 probably actually cost 💰💰 about 💦 $25 👏👏 including hardware, manufacturing, and ➕☝ patent licensing royalties being fixed right ✔✅ up to 🔍 $40…. but that’s 😻 a 👌 far 🆘💦 dumber story 📜📖

ATSC🌋🔎🏇 1.0🌈 has👧🏼🔢 at🆎🏃✊🏻💁🏽 🤴💰 least🎌🔟 two🐃 👬 very♍️ dumb things〰✋🏽 🏋🔱 about📕 🍾💦 it.📛 #1:〰⚡️ 👂 The🍎 🏠 8VSB😑🔳 modulation.👨🏼💅🏽 8VSB🕦🐼 is🌃 basically↗️ 💅 amplitude💎 modulation✌🏿👍🏼😕👷🏾👰🏾 with,🔕 👏😶 spectrally, everything 🙌👍 below🐃 😫😫 the🚍🐍🚲🐋🏇🏽 carrier7⃣🎮 attenuated💙💃🏾🏇🏽 off. In👱🏾🐞 👏 theory,↗️💲🙏🏽 that🕑👿💕 sounds📖🆒😦 ok,💪🏽 except🐎📥 that®🚚 it’s👨‍👨‍👧🏢 🐈 extremely⛎🕗🏊🏼😹 💛 vulnerable💠😣🌝🍛🍡 to🌘✊🚂 😂💦 multipath.🍺👳🏽👙 GUESS 🤔🤔 WHAT🌐🍢🙇🏼 HAPPENS😻🙆🏿😫🐭 ON🌖 EVERY♏️ 👏🤙 TV🔼↖️ 📺📺 SIGNAL👲🏼🍼 IN⛳️🌅👩🏽✊🏿 🍑 AN🔌🍟 💶🌑 URBAN😳👉🏾♓️ AREA.🚣 The🏄🏿🔡🔂🍧 👦 margin’s🈚️🌐💖 not💆🏼💣 that 😐 big👨🏿🚻 👺🍆 for👨‍❤️‍💋‍👨👍🏾 multipath,⏩💛 and🆙 once⌛️🙎🏻🐡 you💊😲🌇™🕘 👏 hit👄 😵👏 it,💴👷🏽💊🍆 😏 the🛀🏾👸🏼 👏👌 whole👴 😍 signal’s🍠🚊👨‍👨‍👦↙️💕 useless,👹🎲👋🏻 leaving🎂🚵🏾🎴 🏃🍃 your💆🏿👼🏾🚨👲🏽📭 viewers👶🏾 to👆🏽🏮 dance🕞🍏 around 👥😇 with💊👸🏽 the ⏲ antenna🙍🏻💪🏼🚄 and♉️🏈 🔙 wonder🕣🎎💒🚏 🤔😮 why😳👻 they🚴🏻 just🐂 😧🤷 can’t ♀ get⛽️ 🅾🉐 picture….☁️ 8VSB⚽️🕙 was🏨🐸🏄 🤣💦 only,🚶🏽🕓 from 😂😲 documentation👱🏼📑 I’ve🍃👱🏽 👈😠 found🆎 ❌ on🌒 🔛💦 it,🙋🏽🈯️📪🙏🏿 🙂👏 lab😰👂🏼 tested📰❌🔵🚣🏿💅🏼 🤓 for🍩😍🌹 😎 performance🙅🏿🔙✏️📒 in👵🌔👐🏿 terms🔀🈸🎥❤️ of👦🏼 🔌😿 signal🔠👱😰❤️ to✊💚 🏿 noise ratio✂️ in😮🌺 🍌 a😫🏠💅🏽 🔫 proof👶🏾🙋 💯📊 for🏇🏽 the💜👐🏽🚑🐟💜 🌌 FCC…👆🏼🚣👂🏿🍻 🏴🏴 no♠️😿🙏🏻🙅🏿 🅱 attempt🍍♊️⛳️👊🎎🕘 was🚈 made⏪ 👑 to🎮🚣🏿 ✂ simulate🙀🚱📩 or💲 💰 measure📚📻 🎛🎛 receiver🏊🚣🏻 performance🚋 in🏊🏻🙅🏾 🐕🏼 the📗😡🙍🏽 face😽👵🚣🍼 of👉🏿🔋 😱 multipath.🙋🏽 I’m🍶🍩 not🙅 😅🚫 sure🚛🏬↙️🍶🏪👼🏼👮🏽😷 if🕑 this🏄🏻⏰👩‍👩‍👧‍👦 was⭕️ 🅿 because🍌 nobody📠👉🏼👈✅👟🛀🏿🐡 ♂♂ ever📺🌁🆑 ⁉ had 💔 the▶️ ⛓👏 “aha!”🐖 moment 😳 and🔚 👏 realized👏🏾🚎 it’d🚎↖️ be🍲🐩🎿 🐝👏 a🙌🏽🎲 problem📊👏📡📈 or👺 if🚉🎏 ❓ some🚈 ☃✝ vendor😳🍝 already🎱 👋😃 heavily🍋 💦💦 invested✌🏽 in😱🚽 it🔄🔩🏊🏾 swept🕑👧🏾 🤣 it🙏🏼🕔😧💗 🙂🤡 under🕠🔬👧🏾🍘🏂🌓 the😣🗼🌌😘 rug. Just📁 👏🗼 about🐄💦🐈↙️ 💩💭 every🙇 other🏇🏼 👪 country🔘 😣🏃 used 🙄🚟 DVB-T🔂♻️🚵🏻📥 which👨‍👩‍👧‍👦🍕🈂 allows🚕💃🏼 for🏃🏾 more♣️ 😡♀ spectrally🔲🔄💁 efficient💇🏻 🔛 and🚎🚴🏼 robust🍬👇🏻👌🏼💃🏾 modulation💽👸🐠♊️ standards👂🏻😊 including 💨 QPSK✋🏻🙆🏻 (very🚹🌱🍫 👿✅ robust📫 but☑️ not📒🔞 as👳🏽 efficient🍦😣🎁👮🏾 as👸🏾 🍑 QAM), 16QAM, and📒🐜👦 ➕ 64QAM.👵🏼🌏👮 This👐🏾🕥🌠◽️ 🙎🤖 raises🌇 another🐛 ♂🏗 issue✅🕞🎭👭 ♂😭 that😛✊🏻🍈🍚🌻 ♥⚪ was🏇🏻🎪 ✨👍 dumber🙋🏻👦🏼📩 on🚸 👋 the broadcaster’s👩🏼 side: 8VSB👉 was🙍🏾 in🔫👞🍫🚾 part🐸 🤐 chosen🚣🏾 because😭📪🔃 🤓 it🔴 would,🏮 in🍑♻️ 📥 theory,👘🙆🏻 😂😂 work👭 through existing🚤💩👱🏼🕙📙 analog🎻💷 transmitters,🍂📧🏣 requiring🚪🚴🏿 only📩 slight🔆 modifications to✋ things🙌🏼🚲 like🚛👈🏼🚇🗼 🗣 the⏰🕣 🎵 combiners💆🏼 and🙎🏿 ♀ an 😆🍆 exciter🏂 swap.💦🔇🍺🌴➗ In🗾⬛️ 👏 practice,🏄🏽 🍆🎯 no🎋🚴🏾 🌈 transmitter🎦 manufacturers really🐀👊🏼🍑 😱 opened🚉 this up😸🔗◀️👔 😍🕺 as🅿️🍋🛂 👦 an📙🙏🏼☀️👄 option,🚷🐽👸🏻 and🌏 everyone👫 😳👨 had🗽⛽️ 💋✊ to✊🏻🏃🏻 💦🚶 buy💛 💲 all🏊🏽 new 🗞🏽 shit.👩‍❤️‍👩 In🙍🏻❇️🐄 fact…⌚️ 🏫 the🕕 klystron🚃💭〽️🎽 based⚓️ UHF television👬 transmitters👋 proved📉 not👐🏾📭 to 👊 have📵🎰🚵🏻💰 the📑🕟 linearity🚃🐇 (or🍺 🙂🚻 SOMETHING)🙅🏼 to🐀⛪️ 👏 deal with👻🔄 👏 8VSB and👸🏾👵🏼😉🐏🅿️💇🏾⏳ 🌞 the💥 Inductive🎀 Output🌉👩🏿 Tube👊🏻 had👕 ❗ to↖️ 💦👏 be🙇🏿🐴✨❔ 😤 brought📨 out🎯😸 💦💯 of✴️ mothballs🔜 to🐷 deal👇🏽😉🕥🚔🔍🛀 with❔💮 🆕 it.👲🏾✏️ 💯 The📂 IOT☝🏻🙎 has👱🏽🚣🏻 🙏 great🎎▶️🔚🏢🚣🏼🍺👚🍪 💪🎉 linearity🎅🏿🍆 but💊 🍑🙅 no🍂🌑 🙅⛔ damn👤🔃 😳 efficiency🎼 -👮🏾 it👶🏽👵 👍🍝 was👂🏼 originally💛👦🏻🚴🏿🌔👉🏼 🔙🔙 used🔽🎅🏾 🆒 by👎🏽👈 👋 General 👮👮 Electric⭐️➗ for🍬🍫🎽🙋🏿 🍆 an💐 💸 early🎃🕢💇🏾 🥂 World’s🐳🚪🍥 🌁🌎 Fair 😆 demo👵🏼🛀🏽 of🔀💃🏾🎠 UHF👐🏼🙆🏼 television broadcasting,👛 but🌀👶🏼🌆 👌🍑 commercially✅ never🙇🏻 ‼ took🚤 🤚 off…🐝 anyway,⏫ later 🕑 on,⏩™ 👏🔛 EEV’s esciot👨🏽 series📴💾👃🏻 💓 tubes improved🌎 on 🏽 that🙋🏻 🌈 somewhat…💇🏻🍻 but…👦🙅🏼 🍑 they’re🍆💁🏾🌘🕧💒 🏼 still 🙄 a🎲👩🏾 pain👯🎢📡🙌🏻 in❤️ the arse Stupid🔒⛄️🎅🏾 Thing⬆️ #2⌛️ (or 🍆 is🎱 it💧🈚️ 💋 about😝👆🏾 💦 #8 🤔 by❤️ now?):🐆🎏 👋☝ MPEG2.🆑🔉👐 Do🚴🏾👋🏼 I🚘🐖 look💆🏽🔱 🔎👁 like🙎🏾🛂↘️ 🅰 I🎪👈🏽 💕 know👐🏽 🙏 what🏫🍂 😅😅 an🎩☝🏻 👹🏿 mpeg😲 is?*👓 💦👶 So🐹 💯💦 here not🚋💾👲🏻👮 😫🙅 only👴🏿👌 do👏🏾🔡 we📝🙇🏻🆑👃 👨 have🌘🙋🏾😝☝🏿 🅰 this🐏🍐☝🏾☕️ shitty💉 😠 8VSB👃🔱 modulation🐢 sapping📭✌🏽 the 💪👊 available🚦👡 amount🔆▫️🔙🔓🏄🏽 📉📉 of👍🏽🔫 💦💦 information that can be✈️❕🚩#⃣ 🐝👼 broadcast↖️👷🏾 in🙍🏿🈴 🚭🏡 a☝🏿🎮🚝🚥🙆 certain👰🏻🙅📄 🤔 width🏠 of⛔️😡 👀👨 channel✋🏿⚓️ but👕🌎 😠🍑 then….🍔 MPEG2🐴 video🎦🌘💹 📽📽 coding🔩⛽️ was🎏💊👩🏾🐵 👏✨ specified.➰⛔️🍴🛀🏽✌🏾😧 I 👉 suspect🏯🐀 that’s🚚✊👴🏾 🏻😐 evidence🙌🏼👴🏼 📃❓ of👨🏾🏈💪🏻💏 💦💦 the👆🏽 👏 standard’s📹♨️ development 🔬 either🍂🕙👥 being📒♦️ 😯 dragged⛲️🆙 out8⃣👶🏿✅ forever🙎🏼❓ 💗 OR🙊♨️ 💁 someone🌿 👤 just🏭 🍅☝ wanted to👲🏼♎️ be🛀 🐝 able🎐 💪💪 to🍂 use👸😶 ⚒😂 up a♐️🗼🐶🐻 🚨🍕 bunch#⃣💻💓✌🏼🙋🏾 of 👍 DVD👼🏻🏊💡 player👊🏼🐈 💰 decoder ASICs🌔🆕🈸 they🍆🚂 👨 had🙎🏿✋🏻 ✊ sitting🕚💇🏽🐠 in🐄💂🏼 🅰😩 a🔺💓 Chinese🍮 😕 warehouse.🎐 As 🙌 a💂🏾👊🏿 result👼🌉👆🏾👘 of🔏 👱💦 the MPEG2 encoding💙🙇🏿🍧👨‍👩‍👧 being💆🏾⬅️🏩 🙏 used,🙊🍥🚑 the🌵 💯 picture 📷🦊 looks✋🏼🔍 👀👉 like 👍 DOUBLE BUTT💆🏼👴🏻㊙️ 😥 when✌🏼 💦💕 there’s🌚👣💉 👌🍝 a🐂🍩🔐👨🏻 🅱👌 lot🔠🌐👧🔸💅🏽♍️📢 of👍🏾 🥗😰 motion,🐎💄 😐 especially🚕 when👉🏾😣 💦 you’re 🗣 running🏇🏽♥️ ♀ a💗 lot🍄 of👩 subchannels🌜🔜🙏🏾 squeezed💦 into🚦👇🏽 🏼🚟 that🏇🏽🔘👋🏼👼🏾👂🏿 💯😻 18.3👩🏻🍨🐤💉 👅👸 megabits/sec…♋️👊🏿 And🎯 💰🏽 then👌🏻🆔🐃🎮📊 😯 you⏪ 🌝👉 have🛅🚏🏡 👩💯 the⛔️🔩 whole👌👨‍👨‍👧‍👦🏆 godawful㊙️ thing🍃 where🍻✌🏻🙍🏼💂🏿🏉 the 🙌 CECB🚪 program🙅🏻 led🌳 to🚈☺️👶🙀 the ♨👏 cost😣 💰📲 of❓🏮 🤔 converter㊙️ boxes👼🏻 🤒🤒 which ✌❓ probably💃🏻🍵🌱🙎🏾 😻 actually🔎🏄🏼📚😽🏄🏾 cost💆🏾✋🏻 about👞 🏽 $25🚨👊🏻🌋 including🚣🏃🏿🚵🏿😼 💨 hardware,👦🏿🏣👂🏼🐏 manufacturing,⏳🐐 and 👏💆 patent📎〰🍫 licensing👮🏿📢🔝 royalties being👨‍👨‍👦 fixed👨🏻🍡 right up0⃣❎ to🕣 🌒 $40….◽️😊 but🌋💛😩♉️🈹 🍑 that’s ➡ a↙️😽🏫🙇🏿 💰🍇 far📟✊🏼👍🏾 💶🌌 dumber🙍🏾📆🕓 story 📗

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