{"id":490382,"date":"2025-09-17T08:50:10","date_gmt":"2025-09-17T01:50:10","guid":{"rendered":"https:\/\/hoanghamobile.com\/tin-tuc\/?p=490382"},"modified":"2025-09-17T08:50:10","modified_gmt":"2025-09-17T01:50:10","slug":"dsp","status":"publish","type":"post","link":"https:\/\/hoanghamobile.com\/tin-tuc\/dsp\/","title":{"rendered":"B\u1ed9 x\u1eed l\u00fd t\u00edn hi\u1ec7u DSP l\u00e0 g\u00ec? Vai tr\u00f2, ch\u1ee9c n\u0103ng v\u00e0 c\u00e1c t\u00ednh n\u0103ng quan tr\u1ecdng"},"content":{"rendered":"

B\u1ea1n \u0111\u00e3 t\u1eebng t\u1ef1 h\u1ecfi t\u1ea1i sao nh\u1eefng thi\u1ebft b\u1ecb hi\u1ec7n \u0111\u1ea1i l\u1ea1i c\u00f3 th\u1ec3 x\u1eed l\u00fd \u00e2m thanh v\u00e0 h\u00ecnh \u1ea3nh m\u1ed9t c\u00e1ch nhanh ch\u00f3ng v\u00e0 s\u1eafc n\u00e9t \u0111\u1ebfn v\u1eady? B\u00ed m\u1eadt n\u1eb1m \u1edf kh\u1ea3 n\u0103ng c\u1ee7a <\/span>DSP<\/b>. V\u1eady ti\u0301n hi\u00ea\u0323u na\u0300y th\u1ef1c s\u1ef1 l\u00e0 g\u00ec? N\u00f3 gi\u1eef vai tr\u00f2 nh\u01b0 th\u1ebf n\u00e0o trong cu\u1ed9c s\u1ed1ng c\u00f4ng ngh\u1ec7 ng\u00e0y c\u00e0ng ph\u00e1t tri\u1ec3n? H\u00e3y c\u00f9ng kh\u00e1m ph\u00e1 s\u00e2u h\u01a1n v\u1ec1 ch\u1ee9c n\u0103ng v\u00e0 nh\u1eefng t\u00ednh n\u0103ng quan tr\u1ecdng c\u1ee7a b\u00f4\u0323 x\u01b0\u0309 ly\u0301 s\u00f4\u0301 nhe\u0301.<\/span><\/p>\n

B\u1ed9 x\u1eed l\u00fd t\u00edn hi\u1ec7u DSP l\u00e0 g\u00ec?<\/b><\/h2>\n

B\u1ed9 x\u1eed l\u00fd t\u00edn hi\u1ec7u s\u1ed1 l\u00e0 m\u1ed9t c\u00f4ng ngh\u1ec7 quan tr\u1ecdng trong l\u0129nh v\u1ef1c x\u1eed l\u00fd v\u00e0 ph\u00e2n t\u00edch c\u00e1c t\u00edn hi\u1ec7u d\u01b0\u1edbi d\u1ea1ng d\u1eef li\u1ec7u s\u1ed1. Kh\u00e1c v\u1edbi x\u1eed l\u00fd t\u00edn hi\u1ec7u t\u01b0\u01a1ng t\u1ef1, chip x\u01b0\u0309 ly\u0301 ti\u0301n hi\u00ea\u0323u s\u00f4\u0301 t\u1eadp trung v\u00e0o vi\u1ec7c thao t\u00e1c v\u00e0 bi\u1ebfn \u0111\u1ed5i chu\u1ed7i c\u00e1c s\u1ed1 \u0111\u1ea1i di\u1ec7n cho t\u00edn hi\u1ec7u nh\u1eb1m c\u1ea3i thi\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng ho\u1eb7c tr\u00edch xu\u1ea5t th\u00f4ng tin c\u1ea7n thi\u1ebft.<\/span><\/p>\n

\"dsp-1\"<\/picture><\/p>\n

B\u1ed9 x\u1eed l\u00fd n\u00e0y \u0111\u00e3 tr\u1edf th\u00e0nh n\u1ec1n t\u1ea3ng cho nhi\u1ec1u \u1ee9ng d\u1ee5ng hi\u1ec7n \u0111\u1ea1i, t\u1eeb \u0111i\u1ec7n t\u1eed ti\u00eau d\u00f9ng \u0111\u1ebfn c\u00e1c h\u1ec7 th\u1ed1ng vi\u1ec5n th\u00f4ng ph\u1ee9c t\u1ea1p. Trong y sinh h\u1ecdc, ma\u0323ch x\u1eed l\u00fd t\u00edn hi\u1ec7u s\u1ed1 gi\u00fap ph\u00e2n t\u00edch v\u00e0 x\u1eed l\u00fd c\u00e1c t\u00edn hi\u1ec7u sinh h\u1ecdc nh\u01b0 \u0111i\u1ec7n t\u00e2m \u0111\u1ed3 hay s\u00f3ng n\u00e3o, g\u00f3p ph\u1ea7n n\u00e2ng cao hi\u1ec7u qu\u1ea3 ch\u1ea9n \u0111o\u00e1n v\u00e0 \u0111i\u1ec1u tr\u1ecb.<\/span><\/p>\n

\u1ede l\u0129nh v\u1ef1c truy\u1ec1n th\u00f4ng, c\u00f4ng ngh\u1ec7 n\u00e0y h\u1ed7 tr\u1ee3 x\u1eed l\u00fd \u00e2m thanh v\u00e0 gi\u1ecdng n\u00f3i, gi\u00fap c\u1ea3i thi\u1ec7n \u0111\u1ed9 r\u00f5 n\u00e9t v\u00e0 lo\u1ea1i b\u1ecf t\u1ea1p \u00e2m, mang l\u1ea1i tr\u1ea3i nghi\u1ec7m nghe t\u1ed1t h\u01a1n. B\u00f4\u0323 x\u01b0\u0309 ly\u0301 s\u00f4\u0301 c\u0169ng \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t trong vi\u1ec7c t\u0103ng c\u01b0\u1eddng ch\u1ea5t l\u01b0\u1ee3ng h\u00ecnh \u1ea3nh, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c thi\u1ebft b\u1ecb camera, truy\u1ec1n h\u00ecnh v\u00e0 c\u00f4ng ngh\u1ec7 n\u00e9n video nh\u01b0 WMV, MPEG.<\/span><\/p>\n

Vai tr\u00f2, ch\u1ee9c n\u0103ng c\u1ee7a thi\u1ebft b\u1ecb x\u1eed l\u00fd t\u00edn hi\u1ec7u DSP<\/b><\/h2>\n

Thi\u1ebft b\u1ecb n\u00e0y th\u1ef1c hi\u1ec7n nhi\u1ec1u ch\u1ee9c n\u0103ng kh\u00e1c nhau \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u00e2m thanh ph\u00e1t ra lu\u00f4n r\u00f5 r\u00e0ng, c\u00e2n b\u1eb1ng v\u00e0 ph\u00f9 h\u1ee3p v\u1edbi m\u00f4i tr\u01b0\u1eddng s\u1eed d\u1ee5ng. Nh\u1edd s\u1ef1 k\u1ebft h\u1ee3p gi\u1eefa ph\u1ea7n c\u1ee9ng v\u00e0 ph\u1ea7n m\u1ec1m \u0111i\u1ec1u khi\u1ec3n, ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng t\u00f9y ch\u1ec9nh c\u00e1c th\u00f4ng s\u1ed1 \u00e2m thanh th\u00f4ng qua c\u00e1c thi\u1ebft b\u1ecb di \u0111\u1ed9ng ho\u1eb7c m\u00e1y t\u00ednh, gi\u00fap ki\u1ec3m so\u00e1t \u00e2m thanh linh ho\u1ea1t v\u00e0 hi\u1ec7u qu\u1ea3 h\u01a1n.<\/span><\/p>\n

\"dsp-2\"<\/picture><\/p>\n

M\u1ed9t trong nh\u1eefng ch\u1ee9c n\u0103ng n\u1ed5i b\u1eadt l\u00e0 gi\u1edbi h\u1ea1n d\u1ea3i t\u1ea7n \u00e2m thanh nh\u1eb1m b\u1ea3o v\u1ec7 h\u1ec7 th\u1ed1ng loa kh\u1ecfi nh\u1eefng t\u00e1c \u0111\u1ed9ng qu\u00e1 m\u1ee9c, tr\u00e1nh h\u01b0 h\u1ea1i thi\u1ebft b\u1ecb. \u0110\u1ed3ng th\u1eddi, ch\u1ee9c n\u0103ng c\u00e2n b\u1eb1ng \u00e2m s\u1eafc (Equalization) gi\u00fap \u0111i\u1ec1u ch\u1ec9nh t\u1ea7n s\u1ed1 \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi \u0111\u1eb7c \u0111i\u1ec3m kh\u00f4ng gian v\u00e0 nhu c\u1ea7u c\u00e1 nh\u00e2n, t\u1ea1o ra \u00e2m thanh c\u00e2n \u0111\u1ed1i v\u00e0 d\u1ec5 ch\u1ecbu h\u01a1n. Ngo\u00e0i ra, vi\u1ec7c ph\u00e2n chia d\u1ea3i t\u1ea7n cho loa sub v\u00e0 loa to\u00e0n d\u1ea3i gi\u00fap t\u00e1i t\u1ea1o \u00e2m thanh ch\u00ednh x\u00e1c, r\u00f5 n\u00e9t \u1edf t\u1eebng m\u1ee9c t\u1ea7n s\u1ed1 kh\u00e1c nhau.<\/span><\/p>\n

B\u1ed9 x\u1eed l\u00fd s\u00f4\u0301 c\u00f2n \u0111\u01b0\u1ee3c trang b\u1ecb ch\u1ee9c n\u0103ng \u0111\u1ea3o pha \u00e2m thanh, gi\u00fap \u0111i\u1ec1u ch\u1ec9nh s\u1ef1 c\u1ed9ng h\u01b0\u1edfng ho\u1eb7c tri\u1ec7t ti\u00eau nh\u1eefng \u00e2m thanh kh\u00f4ng mong mu\u1ed1n, \u0111\u1ed3ng th\u1eddi t\u00ednh n\u0103ng canh d\u1eebng \u00e2m thanh h\u1ed7 tr\u1ee3 h\u1ec7 th\u1ed1ng loa ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh v\u00e0 m\u01b0\u1ee3t m\u00e0. Vi\u1ec7c gi\u1ea3m bi\u1ebfn \u0111\u1ed9ng \u00e2m thanh g\u00f3p ph\u1ea7n mang l\u1ea1i tr\u1ea3i nghi\u1ec7m nghe nh\u1ea1c ho\u1eb7c xem phim tr\u1ecdn v\u1eb9n h\u01a1n.<\/span><\/p>\n

C\u00e1c lo\u1ea1i DSP ph\u1ed5 bi\u1ebfn hi\u1ec7n nay<\/b><\/h2>\n

Hi\u1ec7n nay, tr\u00ean th\u1ecb tr\u01b0\u1eddng t\u1ed3n t\u1ea1i nhi\u1ec1u lo\u1ea1i b\u1ed9 x\u1eed l\u00fd t\u00edn hi\u1ec7u s\u1ed1 v\u1edbi \u0111a d\u1ea1ng thi\u1ebft k\u1ebf v\u00e0 ch\u1ee9c n\u0103ng, ph\u1ee5c v\u1ee5 cho c\u00e1c \u1ee9ng d\u1ee5ng kh\u00e1c nhau t\u1eeb \u00e2m thanh, h\u00ecnh \u1ea3nh \u0111\u1ebfn vi\u1ec5n th\u00f4ng v\u00e0 c\u00f4ng nghi\u1ec7p. M\u1ed7i lo\u1ea1i mang \u0111\u1ebfn nh\u1eefng \u01b0u \u0111i\u1ec3m ri\u00eang bi\u1ec7t, \u0111\u00e1p \u1ee9ng nhu c\u1ea7u x\u1eed l\u00fd t\u00edn hi\u1ec7u hi\u1ec7u qu\u1ea3 trong t\u1eebng l\u0129nh v\u1ef1c c\u1ee5 th\u1ec3.<\/span><\/p>\n

DSP Digital Processor<\/b><\/h3>\n

\u0110\u00e2y l\u00e0 m\u1ed9t b\u1ed9 x\u1eed l\u00fd k\u1ef9 thu\u1eadt s\u1ed1 ti\u00ean ti\u1ebfn, gi\u00fap ng\u01b0\u1eddi d\u00f9ng d\u1ec5 d\u00e0ng \u0111i\u1ec1u ch\u1ec9nh v\u00e0 t\u1ed1i \u01b0u h\u00f3a \u00e2m thanh th\u00f4ng qua c\u00e1c \u1ee9ng d\u1ee5ng ph\u1ea7n m\u1ec1m tr\u00ean \u0111i\u1ec7n tho\u1ea1i ho\u1eb7c m\u00e1y t\u00ednh x\u00e1ch tay. Thi\u1ebft b\u1ecb n\u00e0y kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n x\u1eed l\u00fd t\u00edn hi\u1ec7u m\u00e0 c\u00f2n t\u00edch h\u1ee3p nhi\u1ec1u ch\u1ee9c n\u0103ng quan tr\u1ecdng nh\u1eb1m n\u00e2ng cao tr\u1ea3i nghi\u1ec7m nghe.\u00a0<\/span><\/p>\n

\"dsp-3\"<\/picture><\/p>\n

B\u00ean c\u1ea1nh \u0111\u00f3, ch\u1ee9c n\u0103ng c\u00e2n b\u1eb1ng \u00e2m s\u1eafc (Equalization) cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng t\u00f9y ch\u1ec9nh c\u00e1c m\u1ee9c t\u1ea7n s\u1ed1, t\u1ea1o ra \u00e2m thanh c\u00e2n b\u1eb1ng, r\u00f5 r\u00e0ng v\u00e0 ph\u00f9 h\u1ee3p v\u1edbi t\u1eebng kh\u00f4ng gian s\u1eed d\u1ee5ng. B\u00f4\u0323 ti\u0301n hi\u00ea\u0323u s\u00f4\u0301 na\u0300y c\u00f2n \u0111\u01b0\u1ee3c trang b\u1ecb h\u1ec7 th\u1ed1ng b\u1ea3o v\u1ec7 loa, gi\u00fap ng\u0103n ch\u1eb7n c\u00e1c t\u00edn hi\u1ec7u qu\u00e1 t\u1ea3i g\u00e2y h\u01b0 h\u1ecfng thi\u1ebft b\u1ecb, \u0111\u1ed3ng th\u1eddi gi\u1edbi h\u1ea1n thang \u00e2m \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u00e2m thanh ph\u00e1t ra lu\u00f4n trong ph\u1ea1m vi an to\u00e0n v\u00e0 d\u1ec5 ch\u1ecbu.\u00a0<\/span><\/p>\n

Nhi\u1ec1u th\u01b0\u01a1ng hi\u1ec7u uy t\u00edn hi\u1ec7n nay nh\u01b0 Processor Lake, Soundking, DAS v\u00e0 Inter-M \u0111\u00e3 \u1ee9ng d\u1ee5ng Digital Processor tr\u00ean c\u00e1c s\u1ea3n ph\u1ea9m c\u1ee7a m\u00ecnh, g\u00f3p ph\u1ea7n n\u00e2ng cao ch\u1ea5t l\u01b0\u1ee3ng \u00e2m thanh v\u00e0 mang l\u1ea1i tr\u1ea3i nghi\u1ec7m nghe t\u1ed1i \u01b0u cho ng\u01b0\u1eddi d\u00f9ng.<\/span><\/p>\n

DSP Compressor<\/b><\/h3>\n

\u0110\u00e2y l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb x\u1eed l\u00fd t\u00edn hi\u1ec7u s\u1ed1 quan tr\u1ecdng, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ki\u1ec3m so\u00e1t v\u00e0 \u0111i\u1ec1u ch\u1ec9nh m\u1ee9c \u00e2m l\u01b0\u1ee3ng trong c\u00e1c h\u1ec7 th\u1ed1ng \u00e2m thanh. Vai tr\u00f2 ch\u00ednh c\u1ee7a b\u00f4\u0323 ti\u0301n hi\u00ea\u0323u s\u00f4\u0301 Compressor l\u00e0 c\u00e2n b\u1eb1ng s\u1ef1 dao \u0111\u1ed9ng \u00e2m thanh b\u1eb1ng c\u00e1ch gi\u1ea3m nh\u1eefng ph\u1ea7n \u00e2m thanh qu\u00e1 l\u1edbn v\u00e0 t\u0103ng nh\u1eefng ph\u1ea7n qu\u00e1 nh\u1ecf, gi\u00fap t\u1ea1o ra \u00e2m thanh \u0111\u1ed3ng \u0111\u1ec1u, m\u01b0\u1ee3t m\u00e0 v\u00e0 d\u1ec5 nghe h\u01a1n. Nh\u1edd kh\u1ea3 n\u0103ng n\u00e0y, b\u00f4\u0323 ti\u0301n hi\u00ea\u0323u na\u0300y se\u0303 gi\u00fap l\u00e0m d\u1ecbu c\u00e1c bi\u1ebfn \u0111\u1ed9ng \u00e2m thanh \u0111\u1ed9t ng\u1ed9t, t\u1eeb \u0111\u00f3 n\u00e2ng cao ch\u1ea5t l\u01b0\u1ee3ng tr\u1ea3i nghi\u1ec7m nghe, tr\u00e1nh g\u00e2y kh\u00f3 ch\u1ecbu ho\u1eb7c m\u00e9o ti\u1ebfng.<\/span><\/p>\n

\"dsp-4\"<\/picture><\/p>\n

Ngo\u00e0i ra, thi\u1ebft b\u1ecb c\u00f2n gi\u00fap b\u1ea3o v\u1ec7 loa v\u00e0 c\u00e1c thi\u1ebft b\u1ecb \u00e2m thanh kh\u00e1c kh\u1ecfi t\u00ecnh tr\u1ea1ng qu\u00e1 t\u1ea3i, \u0111\u1ed3ng th\u1eddi \u0111\u1ea3m b\u1ea3o t\u00edn hi\u1ec7u \u00e2m thanh lu\u00f4n \u1ed5n \u0111\u1ecbnh trong qu\u00e1 tr\u00ecnh ph\u00e1t. B\u00f4\u0323 x\u01b0\u0309 ly\u0301 s\u00f4\u0301 Compressor th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c h\u1ec7 th\u1ed1ng \u00e2m thanh chuy\u00ean nghi\u1ec7p, t\u1eeb ph\u00f2ng thu, s\u00e2n kh\u1ea5u bi\u1ec3u di\u1ec5n \u0111\u1ebfn c\u00e1c h\u1ec7 th\u1ed1ng \u00e2m thanh gia \u0111\u00ecnh. Vi\u1ec7c \u0111i\u1ec1u ch\u1ec9nh h\u1ee3p l\u00fd gi\u00fap \u00e2m thanh tr\u1edf n\u00ean trong tr\u1ebbo, s\u1eafc n\u00e9t v\u00e0 c\u00e2n b\u1eb1ng h\u01a1n, \u0111\u1eb7c bi\u1ec7t hi\u1ec7u qu\u1ea3 trong vi\u1ec7c x\u1eed l\u00fd gi\u1ecdng n\u00f3i, nh\u1ea1c c\u1ee5 v\u00e0 c\u00e1c t\u00edn hi\u1ec7u ph\u1ee9c t\u1ea1p kh\u00e1c.<\/span><\/p>\n

M\u1ed9t s\u1ed1 th\u01b0\u01a1ng hi\u1ec7u n\u1ed5i ti\u1ebfng t\u00edch h\u1ee3p Compressor tr\u00ean s\u1ea3n ph\u1ea9m c\u1ee7a m\u00ecnh bao g\u1ed3m ART v\u00e0 Soundking, n\u1ed5i b\u1eadt v\u1edbi ch\u1ea5t l\u01b0\u1ee3ng thi\u1ebft b\u1ecb v\u00e0 t\u00ednh n\u0103ng linh ho\u1ea1t. S\u1ef1 g\u00f3p m\u1eb7t c\u1ee7a Compressor g\u00f3p ph\u1ea7n quan tr\u1ecdng trong vi\u1ec7c n\u00e2ng cao tr\u1ea3i nghi\u1ec7m \u00e2m thanh hi\u1ec7n \u0111\u1ea1i, \u0111\u00e1p \u1ee9ng nhu c\u1ea7u ng\u00e0y c\u00e0ng cao c\u1ee7a ng\u01b0\u1eddi d\u00f9ng.<\/span><\/p>\n

C\u00e1c t\u00ednh n\u0103ng c\u1ea7n quan t\u00e2m khi l\u1ef1a ch\u1ecdn DSP<\/b><\/h2>\n

Vi\u1ec7c n\u1eafm b\u1eaft nh\u1eefng t\u00ednh n\u0103ng c\u1ea7n thi\u1ebft s\u1ebd gi\u00fap b\u1ea1n khai th\u00e1c t\u1ed1i \u0111a kh\u1ea3 n\u0103ng c\u1ee7a b\u00f4\u0323 x\u01b0\u0309 ly\u0301 s\u00f4\u0301, t\u1eeb \u0111\u00f3 c\u1ea3i thi\u1ec7n tr\u1ea3i nghi\u1ec7m nghe, b\u1ea3o v\u1ec7 thi\u1ebft b\u1ecb v\u00e0 \u0111\u00e1p \u1ee9ng linh ho\u1ea1t v\u1edbi c\u00e1c m\u00f4i tr\u01b0\u1eddng \u00e2m thanh kh\u00e1c nhau. N\u00f4\u0323i dung sau \u0111\u00e2y se\u0303 giu\u0301p ba\u0323n t\u00ecm hi\u1ec3u nh\u1eefng \u0111\u1eb7c \u0111i\u1ec3m quan tr\u1ecdng c\u1ea7n l\u01b0u \u00fd khi l\u1ef1a ch\u1ecdn chip x\u1eed l\u00fd t\u00edn hi\u1ec7u s\u1ed1 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o s\u1ef1 \u0111\u1ea7u t\u01b0 hi\u1ec7u qu\u1ea3 v\u00e0 b\u1ec1n l\u00e2u.<\/span><\/p>\n

Time Alignment (Delay)<\/b><\/h3>\n

Time Alignment (Delay) l\u00e0 m\u1ed9t t\u00ednh n\u0103ng quan tr\u1ecdng trong b\u1ed9 x\u1eed l\u00fd t\u00edn hi\u1ec7u s\u1ed1, gi\u00fap \u0111i\u1ec1u ch\u1ec9nh th\u1eddi gian ph\u00e1t \u00e2m thanh gi\u1eefa c\u00e1c loa trong h\u1ec7 th\u1ed1ng. Do s\u00f3ng \u00e2m truy\u1ec1n qua kh\u00f4ng kh\u00ed v\u1edbi t\u1ed1c \u0111\u1ed9 gi\u1edbi h\u1ea1n, \u00e2m thanh t\u1eeb c\u00e1c loa \u0111\u1eb7t \u1edf kho\u1ea3ng c\u00e1ch kh\u00e1c nhau s\u1ebd \u0111\u1ebfn tai ng\u01b0\u1eddi nghe kh\u00f4ng \u0111\u1ed3ng th\u1eddi, g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng l\u1ec7ch pha v\u00e0 gi\u1ea3m ch\u1ea5t l\u01b0\u1ee3ng \u00e2m thanh t\u1ed5ng th\u1ec3. B\u1eb1ng c\u00e1ch \u00e1p d\u1ee5ng hi\u1ec7u \u1ee9ng Delay, \u00e2m thanh t\u1eeb nh\u1eefng loa g\u1ea7n h\u01a1n \u0111\u01b0\u1ee3c tr\u00ec ho\u00e3n ph\u00f9 h\u1ee3p \u0111\u1ec3 \u0111\u1ed3ng b\u1ed9 v\u1edbi \u00e2m thanh ph\u00e1t ra t\u1eeb c\u00e1c loa xa h\u01a1n, gi\u00fap t\u1ea1o ra s\u1ef1 h\u00f2a quy\u1ec7n ho\u00e0n h\u1ea3o gi\u1eefa c\u00e1c ngu\u1ed3n \u00e2m thanh.<\/span><\/p>\n

\"dsp-5\"<\/picture><\/p>\n

Vi\u1ec7c c\u00e2n ch\u1ec9nh th\u1eddi gian n\u00e0y kh\u00f4ng ch\u1ec9 gi\u1ea3m thi\u1ec3u hi\u1ec7n t\u01b0\u1ee3ng \u00e2m thanh ph\u00e1t ra kh\u00f4ng \u0111\u1ec1u ho\u1eb7c t\u1eeb ph\u00eda sau, m\u00e0 c\u00f2n gi\u00fap m\u1edf r\u1ed9ng kh\u00f4ng gian \u00e2m thanh, mang l\u1ea1i c\u1ea3m gi\u00e1c s\u1ed1ng \u0111\u1ed9ng nh\u01b0 \u0111ang \u1edf trong m\u1ed9t kh\u00e1n ph\u00f2ng bi\u1ec3u di\u1ec5n th\u1ef1c th\u1ee5. Nh\u1edd Time Alignment, tr\u1ea3i nghi\u1ec7m nghe nh\u1ea1c ho\u1eb7c xem phim tr\u1edf n\u00ean ch\u00e2n th\u1ef1c v\u00e0 d\u1ec5 ch\u1ecbu h\u01a1n r\u1ea5t nhi\u1ec1u.<\/span><\/p>\n

Crossover<\/b><\/h3>\n

Crossover l\u00e0 m\u1ed9t th\u00e0nh ph\u1ea7n quan tr\u1ecdng trong h\u1ec7 th\u1ed1ng x\u1eed l\u00fd \u00e2m thanh <\/span>DSP<\/b>, ch\u1ecbu tr\u00e1ch nhi\u1ec7m ph\u00e2n chia t\u00edn hi\u1ec7u \u00e2m thanh th\u00e0nh c\u00e1c d\u1ea3i t\u1ea7n s\u1ed1 ph\u00f9 h\u1ee3p \u0111\u1ec3 g\u1eedi \u0111\u1ebfn t\u1eebng lo\u1ea1i loa kh\u00e1c nhau nh\u01b0 loa tr\u1ea7m (woofer) v\u00e0 loa cao t\u1ea7n (tweeter). Nh\u1edd b\u1ed9 l\u1ecdc n\u00e0y, nh\u1eefng \u00e2m thanh kh\u00f4ng mong mu\u1ed1n ho\u1eb7c kh\u00f4ng ph\u00f9 h\u1ee3p v\u1edbi kh\u1ea3 n\u0103ng t\u00e1i t\u1ea1o c\u1ee7a t\u1eebng loa s\u1ebd \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf, g\u00f3p ph\u1ea7n n\u00e2ng cao ch\u1ea5t l\u01b0\u1ee3ng t\u1ed5ng th\u1ec3 c\u1ee7a \u00e2m thanh ph\u00e1t ra. Tuy nhi\u00ean, n\u1ebfu thi\u1ebft l\u1eadp kh\u00f4ng ch\u00ednh x\u00e1c, Crossover c\u00f3 th\u1ec3 g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng bi\u1ebfn d\u1ea1ng \u00e2m thanh, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 trong tr\u1ebbo v\u00e0 c\u00e2n b\u1eb1ng gi\u1eefa loa tr\u1ea7m v\u00e0 loa treble.<\/span><\/p>\n

\"dsp-6\"<\/picture><\/p>\n

\u0110\u1ec3 \u0111\u1ea3m b\u1ea3o hi\u1ec7u qu\u1ea3, ph\u1ea1m vi ho\u1ea1t \u0111\u1ed9ng l\u00fd t\u01b0\u1edfng c\u1ee7a b\u1ed9 l\u1ecdc Crossover th\u01b0\u1eddng n\u1eb1m trong kho\u1ea3ng t\u1eeb 20 Hz \u0111\u1ebfn 20 kHz \u2013 \u0111\u00e2y l\u00e0 d\u1ea3i t\u1ea7n s\u1ed1 m\u00e0 tai ng\u01b0\u1eddi c\u00f3 th\u1ec3 nghe \u0111\u01b0\u1ee3c v\u00e0 c\u0169ng l\u00e0 gi\u1edbi h\u1ea1n gi\u00fap tr\u00e1nh t\u00ecnh tr\u1ea1ng m\u00e9o ti\u1ebfng. Vi\u1ec7c l\u1ef1a ch\u1ecdn t\u1ea7n s\u1ed1 c\u1eaft ph\u00f9 h\u1ee3p v\u00e0 thi\u1ebft k\u1ebf b\u1ed9 l\u1ecdc ch\u00ednh x\u00e1c s\u1ebd gi\u00fap \u00e2m thanh ph\u00e1t ra m\u01b0\u1ee3t m\u00e0, t\u1ef1 nhi\u00ean h\u01a1n, \u0111\u1ed3ng th\u1eddi b\u1ea3o v\u1ec7 c\u00e1c loa kh\u1ecfi b\u1ecb qu\u00e1 t\u1ea3i ho\u1eb7c h\u01b0 h\u1ecfng.<\/span><\/p>\n

Equalization (EQ)<\/b><\/h3>\n

Equalization (EQ) l\u00e0 c\u00f4ng ngh\u1ec7 quan tr\u1ecdng trong x\u1eed l\u00fd \u00e2m thanh, cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng \u0111i\u1ec1u ch\u1ec9nh v\u00e0 ki\u1ec3m so\u00e1t c\u00e1c d\u1ea3i t\u1ea7n s\u1ed1 kh\u00e1c nhau c\u1ee7a t\u00edn hi\u1ec7u \u00e2m thanh ph\u00e1t ra t\u1eeb ngu\u1ed3n. Th\u00f4ng qua EQ, b\u1ea1n c\u00f3 th\u1ec3 t\u0103ng ho\u1eb7c gi\u1ea3m c\u01b0\u1eddng \u0111\u1ed9 \u00e2m thanh t\u1ea1i nh\u1eefng t\u1ea7n s\u1ed1 c\u1ee5 th\u1ec3 nh\u1eb1m t\u1ea1o ra ch\u1ea5t l\u01b0\u1ee3ng \u00e2m thanh ph\u00f9 h\u1ee3p v\u1edbi s\u1edf th\u00edch ho\u1eb7c y\u00eau c\u1ea7u c\u1ee7a kh\u00f4ng gian nghe. Vi\u1ec7c n\u00e0y gi\u00fap c\u00e2n b\u1eb1ng t\u1ed5ng th\u1ec3 \u00e2m thanh, lo\u1ea1i b\u1ecf c\u00e1c t\u1ea1p \u00e2m kh\u00f4ng mong mu\u1ed1n v\u00e0 l\u00e0m n\u1ed5i b\u1eadt c\u00e1c chi ti\u1ebft quan tr\u1ecdng trong b\u1ea3n nh\u1ea1c ho\u1eb7c gi\u1ecdng n\u00f3i.<\/span><\/p>\n

\"dsp-7\"<\/picture><\/p>\n

S\u1ed1 l\u01b0\u1ee3ng c\u00e1c d\u1ea3i t\u1ea7n trong m\u1ed9t h\u1ec7 th\u1ed1ng Equalization th\u01b0\u1eddng dao \u0111\u1ed9ng t\u1eeb m\u1ed9t v\u00e0i \u0111\u1ebfn t\u1ed1i \u0111a kho\u1ea3ng 30, t\u00f9y thu\u1ed9c v\u00e0o lo\u1ea1i thi\u1ebft b\u1ecb v\u00e0 m\u1ee9c \u0111\u1ed9 tinh ch\u1ec9nh c\u1ea7n thi\u1ebft. Khi c\u00f3 nhi\u1ec1u d\u1ea3i t\u1ea7n h\u01a1n, ng\u01b0\u1eddi d\u00f9ng s\u1ebd c\u00f3 nhi\u1ec1u l\u1ef1a ch\u1ecdn \u0111\u1ec3 t\u00f9y ch\u1ec9nh chi ti\u1ebft h\u01a1n, nh\u01b0ng \u0111\u1ed3ng th\u1eddi c\u0169ng \u0111\u00f2i h\u1ecfi thao t\u00e1c ph\u1ee9c t\u1ea1p h\u01a1n \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u00e2m thanh kh\u00f4ng b\u1ecb m\u1ea5t c\u00e2n b\u1eb1ng ho\u1eb7c g\u00e2y kh\u00f3 ch\u1ecbu. Do \u0111\u00f3, vi\u1ec7c s\u1eed d\u1ee5ng EQ hi\u1ec7u qu\u1ea3 \u0111\u00f2i h\u1ecfi s\u1ef1 hi\u1ec3u bi\u1ebft v\u00e0 kinh nghi\u1ec7m \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c hi\u1ec7u qu\u1ea3 t\u1ed1t nh\u1ea5t.<\/span><\/p>\n

Real – Time Analyzer<\/b><\/h3>\n

Real-Time Analyzer (RTA) l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 quan tr\u1ecdng th\u01b0\u1eddng \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p trong c\u00e1c b\u1ed9 x\u1eed l\u00fd \u00e2m thanh <\/span>DSP<\/b>, gi\u00fap ph\u00e2n t\u00edch v\u00e0 hi\u1ec3n th\u1ecb ph\u1ed5 t\u1ea7n s\u1ed1 c\u1ee7a t\u00edn hi\u1ec7u \u00e2m thanh m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c ngay trong th\u1eddi gian th\u1ef1c. M\u1ed7i b\u1ed9 x\u01b0\u0309 ly\u0301 s\u00f4\u0301 \u0111\u1ec1u \u0111\u01b0\u1ee3c trang b\u1ecb m\u1ed9t chip chuy\u00ean d\u1ee5ng nh\u1eb1m th\u1ef1c hi\u1ec7n vi\u1ec7c \u0111o l\u01b0\u1eddng v\u00e0 ph\u00e2n t\u00edch li\u00ean t\u1ee5c c\u00e1c th\u00e0nh ph\u1ea7n \u00e2m thanh, t\u1eeb \u0111\u00f3 cung c\u1ea5p d\u1eef li\u1ec7u tr\u1ef1c quan v\u1ec1 m\u1ee9c \u0111\u1ed9 v\u00e0 s\u1ef1 bi\u1ebfn \u0111\u1ed5i c\u1ee7a c\u00e1c t\u1ea7n s\u1ed1 kh\u00e1c nhau trong t\u00edn hi\u1ec7u \u0111\u1ea7u v\u00e0o.<\/span><\/p>\n

\"dsp-8\"<\/picture><\/p>\n

Khi x\u1eed l\u00fd \u00e2m thanh t\u1eeb ngu\u1ed3n ph\u00e1t, Real-Time Analyzer cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng quan s\u00e1t ngay l\u1eadp t\u1ee9c c\u00e1c thay \u0111\u1ed5i v\u1ec1 t\u1ea7n s\u1ed1 v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 \u00e2m thanh khi \u0111i\u1ec1u ch\u1ec9nh c\u00e1c th\u00f4ng s\u1ed1, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng Equalization. Nh\u1edd v\u1eady, ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 tinh ch\u1ec9nh \u00e2m thanh m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c h\u01a1n, \u0111\u1ea3m b\u1ea3o c\u00e1c d\u1ea3i t\u1ea7n \u0111\u01b0\u1ee3c c\u00e2n b\u1eb1ng h\u1ee3p l\u00fd v\u00e0 t\u1ed1i \u01b0u h\u00f3a ch\u1ea5t l\u01b0\u1ee3ng nghe. C\u00f4ng c\u1ee5 n\u00e0y gi\u00fap ph\u00e1t hi\u1ec7n nhanh ch\u00f3ng nh\u1eefng b\u1ea5t th\u01b0\u1eddng ho\u1eb7c \u0111i\u1ec3m y\u1ebfu trong h\u1ec7 th\u1ed1ng \u00e2m thanh, t\u1eeb \u0111\u00f3 c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t t\u1ed5ng th\u1ec3.<\/span><\/p>\n

Bluetooth<\/b><\/h3>\n

Bluetooth \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t t\u00ednh n\u0103ng thi\u1ebft y\u1ebfu trong c\u00e1c h\u1ec7 th\u1ed1ng \u00e2m thanh hi\u1ec7n \u0111\u1ea1i, mang l\u1ea1i s\u1ef1 ti\u1ec7n l\u1ee3i v\u01b0\u1ee3t tr\u1ed9i cho ng\u01b0\u1eddi d\u00f9ng. Khi d\u00e0n \u00e2m thanh h\u1ed7 tr\u1ee3 k\u1ebft n\u1ed1i Bluetooth, b\u1ea1n c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng truy\u1ec1n t\u1ea3i t\u00edn hi\u1ec7u \u00e2m thanh t\u1eeb \u0111i\u1ec7n tho\u1ea1i, m\u00e1y t\u00ednh b\u1ea3ng ho\u1eb7c c\u00e1c thi\u1ebft b\u1ecb th\u00f4ng minh kh\u00e1c m\u00e0 kh\u00f4ng c\u1ea7n d\u00e2y c\u00e1p ph\u1ee9c t\u1ea1p. \u0110i\u1ec1u n\u00e0y kh\u00f4ng ch\u1ec9 gi\u00fap kh\u00f4ng gian s\u1eed d\u1ee5ng tr\u1edf n\u00ean g\u1ecdn g\u00e0ng h\u01a1n m\u00e0 c\u00f2n t\u1ea1o \u0111i\u1ec1u ki\u1ec7n linh ho\u1ea1t trong vi\u1ec7c ph\u00e1t nh\u1ea1c ho\u1eb7c \u0111i\u1ec1u ch\u1ec9nh \u00e2m thanh.<\/span><\/p>\n

\"dsp-9\"<\/picture><\/p>\n

Ngo\u00e0i kh\u1ea3 n\u0103ng truy\u1ec1n d\u1eef li\u1ec7u kh\u00f4ng d\u00e2y, nhi\u1ec1u b\u1ed9 x\u1eed l\u00fd t\u00edn hi\u1ec7u s\u1ed1 hi\u1ec7n nay c\u00f2n cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng \u0111i\u1ec1u khi\u1ec3n c\u00e1c ch\u1ee9c n\u0103ng nh\u01b0 Equalization (EQ) tr\u1ef1c ti\u1ebfp qua \u1ee9ng d\u1ee5ng tr\u00ean \u0111i\u1ec7n tho\u1ea1i. Nh\u1edd v\u1eady, b\u1ea1n c\u00f3 th\u1ec3 t\u00f9y ch\u1ec9nh \u00e2m s\u1eafc, c\u00e2n b\u1eb1ng t\u1ea7n s\u1ed1 v\u00e0 c\u00e1c th\u00f4ng s\u1ed1 kh\u00e1c m\u1ed9t c\u00e1ch nhanh ch\u00f3ng v\u00e0 ch\u00ednh x\u00e1c ngay c\u1ea3 khi \u0111ang \u1edf xa thi\u1ebft b\u1ecb ch\u00ednh.<\/span><\/p>\n

K\u00eanh t\u00edn hi\u1ec7u<\/b><\/h3>\n

K\u00eanh t\u00edn hi\u1ec7u l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 quan tr\u1ecdng khi l\u1ef1a ch\u1ecdn b\u1ed9 x\u1eed l\u00fd t\u00edn hi\u1ec7u s\u1ed1, quy\u1ebft \u0111\u1ecbnh kh\u1ea3 n\u0103ng k\u1ebft n\u1ed1i v\u00e0 \u0111i\u1ec1u khi\u1ec3n c\u00e1c loa trong h\u1ec7 th\u1ed1ng \u00e2m thanh. Th\u00f4ng th\u01b0\u1eddng, c\u00e1c thi\u1ebft b\u1ecb x\u01b0\u0309 ly\u0301 s\u00f4\u0301 c\u01a1 b\u1ea3n \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf v\u1edbi 4 k\u00eanh, ph\u00f9 h\u1ee3p \u0111\u1ec3 k\u1ebft n\u1ed1i v\u1edbi 4 loa c\u00e1nh trong h\u1ec7 th\u1ed1ng \u00e2m thanh ti\u00eau chu\u1ea9n, \u0111\u1ed3ng th\u1eddi c\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3 th\u00eam m\u1ed9t k\u00eanh ri\u00eang d\u00e0nh cho loa si\u00eau tr\u1ea7m (subwoofer). \u0110i\u1ec1u n\u00e0y gi\u00fap ng\u01b0\u1eddi d\u00f9ng d\u1ec5 d\u00e0ng thi\u1ebft l\u1eadp h\u1ec7 th\u1ed1ng \u00e2m thanh c\u00e2n b\u1eb1ng v\u00e0 \u0111\u1ea7y \u0111\u1ee7, \u0111\u00e1p \u1ee9ng nhu c\u1ea7u nghe nh\u1ea1c ho\u1eb7c gi\u1ea3i tr\u00ed th\u00f4ng th\u01b0\u1eddng.<\/span><\/p>\n

\"dsp-10\"<\/picture><\/p>\n

\u0110\u1ed1i v\u1edbi nh\u1eefng b\u1ed9 x\u01b0\u0309 ly\u0301 s\u00f4\u0301 cao c\u1ea5p h\u01a1n, s\u1ed1 l\u01b0\u1ee3ng k\u00eanh t\u00edn hi\u1ec7u c\u00f3 th\u1ec3 m\u1edf r\u1ed9ng l\u00ean \u0111\u1ebfn 6, 8, 10 ho\u1eb7c th\u1eadm ch\u00ed 12 k\u00eanh, t\u1ea1o \u0111i\u1ec1u ki\u1ec7n cho vi\u1ec7c l\u1eafp \u0111\u1eb7t h\u1ec7 th\u1ed1ng \u00e2m thanh ph\u1ee9c t\u1ea1p v\u00e0 \u0111a d\u1ea1ng h\u01a1n. Vi\u1ec7c t\u0103ng s\u1ed1 l\u01b0\u1ee3ng k\u00eanh gi\u00fap ph\u00e2n ph\u1ed1i \u00e2m thanh chi ti\u1ebft h\u01a1n \u0111\u1ebfn t\u1eebng loa ri\u00eang bi\u1ec7t, mang l\u1ea1i tr\u1ea3i nghi\u1ec7m nghe s\u1ed1ng \u0111\u1ed9ng, ch\u00ednh x\u00e1c v\u00e0 ph\u00f9 h\u1ee3p v\u1edbi kh\u00f4ng gian l\u1edbn ho\u1eb7c c\u00e1c thi\u1ebft k\u1ebf xe h\u01a1i \u0111\u00f2i h\u1ecfi ch\u1ea5t l\u01b0\u1ee3ng \u00e2m thanh cao.<\/span><\/p>\n

K\u00ea\u0301t lu\u00e2\u0323n<\/b><\/h2>\n

T\u1ed5ng k\u1ebft l\u1ea1i, <\/span>DSP <\/b>kh\u00f4ng ch\u1ec9 l\u00e0 b\u1ed9 x\u1eed l\u00fd t\u00edn hi\u1ec7u s\u1ed1 \u0111\u01a1n thu\u1ea7n m\u00e0 c\u00f2n l\u00e0 trung t\u00e2m quan tr\u1ecdng trong vi\u1ec7c n\u00e2ng cao ch\u1ea5t l\u01b0\u1ee3ng \u00e2m thanh v\u00e0 tr\u1ea3i nghi\u1ec7m nghe c\u1ee7a ng\u01b0\u1eddi d\u00f9ng. V\u1edbi nhi\u1ec1u t\u00ednh n\u0103ng ti\u00ean ti\u1ebfn, b\u00f4\u0323 x\u01b0\u0309 ly\u0301 s\u00f4\u0301 gi\u00fap t\u1ed1i \u01b0u h\u00f3a m\u1ecdi kh\u00eda c\u1ea1nh c\u1ee7a h\u1ec7 th\u1ed1ng \u00e2m thanh, t\u1eeb c\u00e1c thi\u1ebft b\u1ecb c\u00e1 nh\u00e2n \u0111\u1ebfn c\u00e1c d\u00e0n \u00e2m thanh chuy\u00ean nghi\u1ec7p.<\/span><\/p>\n

Xem th\u00eam:<\/b><\/p>\n