{"id":4165,"date":"2021-09-26T11:59:34","date_gmt":"2021-09-26T11:59:34","guid":{"rendered":"http:\/\/mp4gain.com\/mp4gain\/?p=4165"},"modified":"2021-09-26T11:59:34","modified_gmt":"2021-09-26T11:59:34","slug":"what-is-a-bluetooth-codec-part-2","status":"publish","type":"post","link":"https:\/\/mp4gain.com\/mp4gain\/what-is-a-bluetooth-codec-part-2\/","title":{"rendered":"What is a Bluetooth codec? Part 2"},"content":{"rendered":"

What is a Bluetooth codec? Part 2<\/strong><\/p>\n

\"Bluetooth\"<\/p>\n

The codec is a factor that determines the quality of the sound
\nIt is sometimes said that the sound quality changes depending on the Bluetooth codec, but it is more accurate to think of it as “a factor that determines the sound quality”.<\/p>\n

\"bluetooth\"<\/p>\n

For example, the order in which sounds are transmitted when listening to music with wireless headphones can be simplified as follows.<\/p>\n

Play music on your smartphone (playback device \/ software)
\nMusic data is compressed and transmitted to headphones (codec)
\nRestore the data received by the headphones to the analog signal (DAC)
\nAmplify the analog signal (amplifier)
\nSend the amplified signal to the speaker (driver)
\nAs mentioned above, there are many factors that determine the sound quality other than the Bluetooth codec, so it is good to understand that “the sound quality does not change with the Bluetooth codec alone.”<\/p>\n

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Bluetooth codec list
\nWe present the main Bluetooth codecs used in Bluetooth audio equipment.<\/p>\n

Bluetooth codec list
\nFeature codec name
\nSBC Standard Bluetooth Audio Codec
\nCAA High quality sound codec mainly used in iPhone
\naptX Higher sound quality and lower delay than SBC and AAC
\naptX LL Sound quality equivalent to aptX and less lag
\naptX HD High-quality sound codec supporting 24-bit \/ 48 kHz
\nAdaptive aptX Codec that achieves high sound quality, low lag, and connection stability
\nLDAC High-quality sound codec developed by SONY that supports up to 24-bit \/ 96kHz
\nSamsung scalable codec Achieves high sound quality and connection stability with the original Samsung codec
\nHWA High-quality, low-delay codec developed by Huawei
\nUAT 24-bit \/ 192 kHz ultra-high sound quality with original Hiby Music codec
\nSBC
\nSBC (Subband Codec) is a standard codec for Bluetooth audio.<\/p>\n

The number of quantization bits \/ sample rate is 16-bit \/ 48 kHz, the latency (delay) is 220 ms (\u00b1 50 ms), and in principle it can be played on all Bluetooth audio devices.<\/p>\n

At the beginning of its appearance it was said that the sound quality was poor, but it has been improving with the advancement of technology, and it is said that it has reached a level comparable to other codecs depending on the device.<\/p>\n

CAA<\/p>\n

Source: AirPods (2nd generation) -Apple (Japan)<\/p>\n

AAC (Advanced Audio Coding) is a codec with lower delay and higher sound quality than SBC.<\/p>\n

The number of quantization bits \/ sample rate is 16 bit \/ 48 kHz and the latency (delay) is 120 ms (\u00b1 30 ms) at 128 kbps, which is mainly used in Apple products (iPhone \/ iPad).<\/p>\n

aptX<\/p>\n

Source: Qualcomm\u00ae aptX \u2122 Audio<\/p>\n

aptX is a high-quality, low-latency codec developed by CSR (currently purchased by Qualcomm).<\/p>\n

The number of quantization bits \/ sample rate is 16-bit \/ 48 kHz and the latency (delay) is 70 ms (\u00b1 10 ms), which is used in the standard codec of Android smartphones.<\/p>\n

aptX LL<\/p>\n

Source: Qualcomm\u00ae aptX \u2122 Low Latency Synchronized Audio<\/p>\n

As the name implies, aptX LL (aptX Low Latency) is a low latency codec.<\/p>\n

The number of quantization bits \/ sample rate is 16 bits \/ 48 kHz, which is the same as aptX, but the latency (delay) is very small, less than 40 ms.<\/p>\n

Since there is little discrepancy between video and audio, it can be said to be the best codec for watching videos and gaming.<\/p>\n

aptX HD<\/p>\n

Source: Qualcomm\u00ae aptX \u2122 HD Audio<\/p>\n

aptX HD is a codec that improves the sound quality of aptX.<\/p>\n

Although the latency (delay) is approximately 130 ms, which is less than aptX, the number of quantization bits \/ sample rate has been expanded to 24-bit \/ 48 kHz and the range of expression has been expanded.<\/p>\n","protected":false},"excerpt":{"rendered":"

What is a Bluetooth codec? Part 2 The codec is a factor that determines the quality of the sound It is sometimes said that the sound quality changes depending on the Bluetooth codec, but it is more accurate to think of it as “a factor that determines the sound quality”. For example, the order in … Continue reading “What is a Bluetooth codec? Part 2”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[257],"tags":[63129,63120,50022,50024,63121,50020,50023,64610,63119,63130,50106,50141,50032,55115,64611,50029,55414,50028,50031,50035,50040,50043,63123,63124,50038,24743,63122,50036,55117,63126,64612,64613,50046,60396,50051,60397,50058,50053,50052,50054,50059,63128,55118,63127,50073,50065,60398,50060,50068,50069,60403,50079,50077,50078,50081,63133,50076,63134,50074,50088,60404,55119,63135,50087,64614,50084,50086,50072,60402,50097,50095,50092,50094,50093,63137,60405,50098,50071,50105,50100,50103,24818,50101,50102,63138,63141,50114,63140,50107,55459,50113,50110,50109,55123,50115,50116,50117,64615,55124,63143,50119,63144,55125,60410,50130,50124,50126,50127,64616,50170,10875,50135,50131,64617,50134,50132,50137,60411,63131,63132,63147,63148,50140,50138,55127,63150,50143,63149,60415,64618,63152,64619,50147,63153,60414,63151,50169,60416,50167,50166,50155,64620,55486,50156,50159,63154,63156,50157,50163,50075],"class_list":["post-4165","post","type-post","status-publish","format-standard","hentry","category-audio-normalizer","tag-add-bluetooth-device","tag-are-bluetooth-earbuds-allowed-on-planes","tag-are-bluetooth-headphones-allowed-on-planes","tag-are-bluetooth-headphones-good-for-gaming","tag-are-bluetooth-headphones-harmful","tag-are-bluetooth-headphones-safe","tag-are-bluetooth-keyboards-good-for-gaming","tag-are-bluetooth-mouse-good-for-gaming","tag-are-bluetooth-speakers-allowed-on-planes","tag-bluetooth-has-a-problem-starting","tag-bluetooth-was-named-after","tag-bluetooth-who-was-he","tag-can-bluetooth-be-hacked","tag-can-bluetooth-cause-cancer","tag-can-bluetooth-headphones-be-used-on-a-plane","tag-can-bluetooth-headphones-connect-to-ps4","tag-can-bluetooth-headphones-connect-to-tv","tag-can-bluetooth-headphones-connect-to-xbox","tag-can-bluetooth-interfere-with-wifi","tag-can-bluetooth-work-without-wifi","tag-did-bluetooth-adapter","tag-did-bluetooth-cost-money","tag-did-bluetooth-earphones","tag-did-bluetooth-exist-in-2005","tag-did-bluetooth-get-its-name","tag-did-bluetooth-headphones","tag-did-bluetooth-headphones-blast","tag-did-bluetooth-speaker","tag-do-bluetooth-headphones-cause-cancer","tag-do-bluetooth-headphones-work-on-airplane-mode","tag-do-bluetooth-headphones-work-on-airplanes","tag-do-bluetooth-headphones-work-on-ps4","tag-do-bluetooth-headphones-work-with-switch","tag-do-bluetooth-headphones-work-with-xbox-one","tag-do-bluetooth-keyboards-work-with-ipad","tag-do-bluetooth-speakers-need-wifi","tag-does-bluetooth-cause-cancer","tag-does-bluetooth-drain-battery","tag-does-bluetooth-use-data","tag-does-bluetooth-work-in-airplane-mode","tag-does-bluetooth-work-on-a-plane","tag-does-bluetooth-work-on-airplanes","tag-does-bluetooth-work-underwater","tag-does-bluetooth-work-without-wifi","tag-dont-have-bluetooth-on-windows-10","tag-had-fun-bluetooth","tag-has-bluetooth","tag-has-bluetooth-changed","tag-have-bluetooth-on-pc","tag-have-bluetooth-samsung-smart-tv","tag-how-bluetooth-earbuds-work","tag-how-bluetooth-got-its-name","tag-how-bluetooth-headphones-work","tag-how-bluetooth-speakers-work","tag-how-bluetooth-transmitter-works","tag-how-bluetooth-was-invented","tag-how-bluetooth-works","tag-how-bluetooth-works-in-car","tag-iphone-have-bluetooth","tag-is-bluetooth-a-company","tag-is-bluetooth-allowed-on-planes","tag-is-bluetooth-bad-for-your-brain","tag-is-bluetooth-capitalized","tag-is-bluetooth-encrypted","tag-is-bluetooth-on","tag-is-bluetooth-safe","tag-is-bluetooth-secure","tag-ps4-have-bluetooth","tag-roku-have-bluetooth","tag-should-bluetooth-always-be-on","tag-should-bluetooth-be-capitalized","tag-should-bluetooth-be-on-or-off","tag-should-bluetooth-be-on-or-off-on-ipad","tag-should-bluetooth-be-on-or-off-on-iphone","tag-should-bluetooth-be-on-or-off-on-my-iphone","tag-should-bluetooth-be-on-or-off-on-my-laptop","tag-should-bluetooth-be-on-or-off-on-my-phone","tag-switch-have-bluetooth","tag-was-bluetooth-a-invention","tag-was-bluetooth-a-viking","tag-was-bluetooth-around-in-2007","tag-was-bluetooth-headphones","tag-was-bluetooth-invented-in-australia","tag-was-bluetooth-invented-in-denmark","tag-was-bluetooth-speaker","tag-what-bluetooth-does-airpods-use","tag-what-bluetooth-driver-do-i-need","tag-what-bluetooth-earbuds-are-compatible-with-ps4","tag-what-bluetooth-headphones-work-with-ps4","tag-what-bluetooth-headphones-work-with-ps5","tag-what-bluetooth-headphones-work-with-xbox-one","tag-what-bluetooth-version-do-i-have","tag-what-bluetooth-version-is-my-phone","tag-when-bluetooth-doesnt-connect","tag-when-bluetooth-doesnt-work","tag-when-bluetooth-invented","tag-when-bluetooth-is-on","tag-when-bluetooth-is-on-what-does-it-do","tag-when-bluetooth-is-on-wifi-is-slow","tag-when-bluetooth-was-initially-developed","tag-when-bluetooth-wont-connect","tag-where-bluetooth-came-from","tag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is a Bluetooth codec? 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