TW576121B - Automobile sound system and method of sound reproduction - Google Patents
Automobile sound system and method of sound reproduction Download PDFInfo
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- TW576121B TW576121B TW91102644A TW91102644A TW576121B TW 576121 B TW576121 B TW 576121B TW 91102644 A TW91102644 A TW 91102644A TW 91102644 A TW91102644 A TW 91102644A TW 576121 B TW576121 B TW 576121B
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576121 A7576121 A7
五、發明説明 發明背景 1) 發明領域 本發明領域與聲音再生有關,尤其是與汽車或交通工具 聲晋系統中使用之揚聲器配置及相 2) 宜立 音頻系統係汽車及其它交通工具中所常見。此類系統一 般均利用範圍自簡單廣播至相當複雜之立體程式源,或cd 及錄音帶電唱機之多聲道系統,併同多重均衡器、預放大器 、功率放大器等。 雖然習知汽車音頻系統之配置與部件差異極大,但大多 在提供最高聲質上,面臨程度不等之既存問題。這些問題係 肇因於與良視聽室相較之下之特殊汽車聲音環境。其中缺 點如次· •過低之内部音量造成反射時間下降,以及低頻時較低之 語態(modal)密度造成氣氛低落與不穩定之低音響應。 •咼反射面(诸如車窗)與咼吸收面(諸如車内裝潢或衣著)之 相鄰,導致頻率差異大,以及抵達聽者之直接或間接聲音 之頭邵位置。因此即使頭部或座椅位置之些微變化,亦可 導致音樂音質之顯著及不可預期變化。 •跨聽位置需受限於座椅位置(一般為4或5個),並且它們相 對於揚聲器位置亦非常不對稱。空間常係車内之優先考 量因素,故揚聲器常係視便利置放,諸如踏板處及前後側 門底部’自音頻觀點而言,大多不佳。結果聽者頭部常極 接近左或右方揚聲器,造成直接之大内聲道時間差及聲 -5- : 本紙張尺度適用中國國家標準(CNS) A4規格(210X 297公釐) 576121 A7V. Description of the invention Background of the invention 1) Field of the invention The field of the invention is related to sound reproduction, especially to the speaker configuration and phase used in the sound system of cars or vehicles. 2) Yili audio system is common in cars and other vehicles. . Such systems generally use multi-channel systems ranging from simple broadcasts to fairly complex stereo program sources, or CD and audio record players, and are used with multiple equalizers, preamps, and power amplifiers. Although the configuration and components of conventional car audio systems vary widely, most of them face the existing problems of providing the highest sound quality to varying degrees. These problems are due to the special car sound environment compared to good audiovisual rooms. The shortcomings are as follows: • The internal volume is too low, which results in a decrease in reflection time, and the low modal density at low frequencies causes a low atmosphere and unstable bass response. • The proximity of the radon reflecting surface (such as a car window) and the radon absorbing surface (such as the car interior or clothing) results in a large frequency difference and the position of the head of the direct or indirect sound that reaches the listener. So even slight changes in head or seat position can lead to significant and unexpected changes in music sound quality. • The listening position needs to be limited by the seat position (typically 4 or 5) and they are also very asymmetric with respect to the speaker position. Space is often a priority in the car, so speakers are often placed for convenience, such as at the pedals and the bottom of the front and rear side doors. Most of them are not good from an audio point of view. As a result, the listener ’s head is often very close to the left or right speaker, resulting in a direct large internal channel time difference and sound. -5-: This paper size applies to China National Standard (CNS) A4 (210X 297 mm) 576121 A7
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思之效果’但無法提供穩定f彡像,因前述㈣穩定度有關之 問題仍未解決。此類設計取向之可觀額外成本,在高成本敏 感度與競爭性之汽車工業中,常非所欲。此外,如前述,汽 車内部空間常係優先考量„,使得最佳揚聲器位置因而 受限。 因此,優點在於提供一經改善之汽車聲音系統,豈可克服 -或多個前述問題或缺點,並可提供經改善之聲質,同時將 音頻系統之成本降至最低。 發明概要 本發明-般指向汽車聲音系統之—態樣,其包括揚聲器 配置、揚聲器位置及聲音處理組合,俾將車内或類似交通工 具★中,因聽者與揚㈣位置不可確定之不對料致之非所 欲聲音效應降至最低,並對所有乘客提供更均勻聲效。 在-或多個具體實施例中,-汽車聲音再生系統包括_ 對緊密相鄰並位於操作台或儀表板前方之揚聲器,而其幾 何中心則係位於交通工具之對稱中心轴上(或可盡量接近)。 聲音再生系統更包括一提供音頻信號至揚聲器對之聲音處 理器較佳。由於左與右中央揚聲器彼此有效相鄰,故可將聲 晋資訊抵達時間差減至最低,而兩揚聲器之相對音量維持 近乎相同。此外,左右乘客均可感覺來自中央揚聲器對,近 乎相同之音量,並將直接對間接聲音比降至最低。 依一較佳具體實施例,聲音處理器係利用交互抵消技術 “擴展”兩緊密相間揚聲器產生之聲音影像,例如:其中抵消 信號係自左右聲道差推估而得。將所得之差異信號加入左 本紙張尺度適用中國國家標準(CNS) Μ規格(21〇X297公爱)-—------The effect of thinking ”does not provide a stable f image, because the problems related to the aforementioned stability have not been resolved. The considerable additional costs of such design orientations are often undesirable in the automotive industry with high cost sensitivity and competitiveness. In addition, as mentioned above, the internal space of a car is often a priority consideration, which limits the optimal speaker position. Therefore, the advantage is that how to provide an improved car sound system can overcome-or more of the aforementioned problems or disadvantages, and provide Improve the sound quality while minimizing the cost of the audio system. SUMMARY OF THE INVENTION The present invention, which is generally directed to a car sound system, includes a speaker configuration, a speaker position, and a sound processing combination. In the embodiment, the undesired sound effect due to the undefined position of the listener and the speaker is minimized, and more uniform sound effects are provided to all passengers. In one or more specific embodiments, the car sound regeneration system includes _ For speakers that are closely adjacent and located in front of the console or dashboard, the geometric center is on the symmetrical center axis of the vehicle (or as close as possible). The sound reproduction system also includes an audio signal to the speaker pair. The sound processor is better. Since the left and right center speakers are effectively adjacent to each other, the sound information can be arrived at The time difference is minimized, and the relative volume of the two speakers remains nearly the same. In addition, both left and right passengers can feel from the center speaker pair, with almost the same volume, and the direct to indirect sound ratio is minimized. According to a preferred embodiment The sound processor uses the interactive cancellation technology to "extend" the sound and image produced by two closely spaced speakers. For example: the cancellation signal is estimated from the difference between the left and right channels. The difference signal is added to the left of the paper. Standard (CNS) M specifications (21〇297 public love) -------
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五、發明説明(5. Description of the invention (
聲道與極性相反之右聲道前,先經比例調整、延遲(如有所 需)’並經頻譜變更。此對差異聲道之頻譜變更以在特定頻 率範圍内間之低頻提昇型式較佳,俾利在差異處理(在各聲 道之低頻信號類似時,會導致低音損失)後,恢復正確之音 色對比。可在差異聲道中附加相位補償全通網路,俾對常為 最低相位偏移頻譜變更電路造成之額外相位偏移做修正, 使得抵消信號與直接信號間之正確相位關係得以在所欲頻 率範圍間維持不變。In front of the right channel with the opposite polarity, the channel is scaled, delayed (if necessary), and changed in spectrum. This spectrum change of differential channels is better for low-frequency boosting within a specific frequency range. After correcting the difference (when the low-frequency signals of each channel are similar, it will cause bass loss), and restore the correct tone contrast. . Can add phase compensation all-pass network in the difference channel, and correct the extra phase offset often caused by the lowest phase offset spectrum changing circuit, so that the correct phase relationship between the cancelling signal and the direct signal can be at the desired frequency The range remains unchanged.
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576121 A7 B7 五、發明説明(5 ) 型豪華轎車),可在駕駛箱及乘客箱中使用一對前中央揚聲 器,後者可應用於後方座位中,具多聲道環場聲效之音樂影 音或影片影音表演。 進一步之具體實施例、變化及增進亦在此處述之。 圖式描述 圖i係依此處所揭之一或多個具體實施例之較佳汽車聲音 系統圖。 圖2A係對一對立體聲揚聲器之較佳揚聲器箱前剖面圖。 圖2B係圖2A所示揚聲器箱上橫剖面圖。 圖2C係圖2A與2B所示揚聲器箱之斜前視圖。 圖2D係來自朝下揚聲器之聲音反射闡釋圖,諸如圖2A-2C 揚聲器箱中之揚聲器。 圖3係依此處所揭乏一或多個具體實施例中之聲音處理系 統方塊簡圖。 圖4係聲音處理系統之較詳細圖示。 圖5係用以闡釋換函數之聲音處理系統圖。 圖6係依圖4與5所示系統之一般原則之聲音系統圖,適用 於環場聲音系統組織。 圖7A與7B係依圖5之聲音處理系統中,頻率響應及相位轉 換函數示例圖,其並具頻譜權重、均衡及相位補償特性。 圖8係汽車或其它交通工具之環場聲音系統圖。 圖9A、9B與9C係一對中央揚聲器之可能置放位置闡圖。 圖10係採用線性頻譜權重濾波器之聲音處理器圖示。 圖11係用以提供大幅改善之極端左/右聲音之汽車聲音系 -9 - 本紙張尺度適用中國國家標準(CNS) A4規格(210X 297公釐)576121 A7 B7 V. Description of the Invention (5) luxury car), a pair of front center speakers can be used in the driver's and passenger compartments, the latter can be used in rear seats, music videos or movies with multi-channel surround sound effects Audiovisual performances. Further specific embodiments, changes and enhancements are also described here. Description of the Drawings Figure i is a preferred car sound system diagram according to one or more embodiments disclosed herein. Figure 2A is a front sectional view of a preferred speaker box for a pair of stereo speakers. Fig. 2B is a cross-sectional view of the speaker box shown in Fig. 2A. Fig. 2C is an oblique front view of the speaker box shown in Figs. 2A and 2B. FIG. 2D is an explanatory diagram of sound reflection from a downward-facing speaker, such as the speaker in the speaker box of FIGS. 2A-2C. FIG. 3 is a block diagram of a sound processing system according to one or more embodiments disclosed herein. Figure 4 is a more detailed illustration of a sound processing system. Fig. 5 is a diagram of a sound processing system for explaining a transfer function. Fig. 6 is a sound system diagram according to the general principles of the systems shown in Figs. 4 and 5, and is applicable to the organization of a ring field sound system. Figures 7A and 7B are examples of frequency response and phase conversion functions in the sound processing system according to Figure 5, which also have spectral weight, equalization, and phase compensation characteristics. Figure 8 is a diagram of the sound field system of a car or other vehicle. 9A, 9B and 9C are diagrams illustrating possible placement positions of a pair of center speakers. Figure 10 is a diagram of a sound processor using a linear spectral weighting filter. Figure 11 is a car sound system that provides greatly improved extreme left / right sound. -9-This paper size is in accordance with China National Standard (CNS) A4 (210X 297 mm)
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線 576121 A7 B7 五、發明説明(Line 576121 A7 B7 V. Description of the invention (
統示例方塊圖,其與緊密相間之中央處理器對相連。 圖12係用以闡釋此處所揭各具體實施例中之揚聲哭間隔 與差異聲道增益間關係圖。 一胃=1 圖13係)·气4 M U通工具環場聲音系统之另—具體實 施例圖示。 、 與UA與14Β係用以比較此處所揭各具體實施例盘先前技 藝間之揚聲器位置及聲音處理之音頻效應圖示。、 圖15-1、15-2與15-3係依圖16之聲音處理系統之增益及/或相 位轉換函數示例圖。 圖丨6係依圖4所示佈局之聲音處理系統圖,更顯示對某些 處理區塊可能之轉換函數特性。 較佳具體實施例細部描述 圖1係依此處所揭之一或多個具體實施例之較佳汽車聲音 系統100圖。在圖1中,兩揚聲器114、115係緊密相鄰,並分別 接收及響應於來自聲音處理器108之音頻信號132與133。揚聲 态114、115為左右揚聲器較佳,基本上可(但非必要)相同,並 可如此處之進一步敘述,間距為‘此外,其可為任何適當尺 寸及機型,俾符合可獲得之汽車區域或其它空間之尺寸限 制。再者,揚聲器114、115可位於汽車内部中央軸上或接近 之’諸如在中央操作台或儀表板中央上方,或在駕駛與乘客 座位間之中央島上。 聲音處理器108自適當之音頻信號源ι〇5接收音頻輸入信號 102與103,其係來自任何典型、可納於其内之汽車音頻部件 (例如CD唱機、錄音帶撥放機、廣播等)。音頻輸入信號1〇2、 -10- 本紙張尺度適用中a g家標準(CNS) A4規格(21C) χ 297公董-)—An example block diagram of a system connected to closely-spaced pairs of CPUs. FIG. 12 is a diagram for explaining the relationship between the loud cry interval and the difference channel gain in the specific embodiments disclosed herein. One stomach = 1 Fig. 13) · Qi 4 M U-pass tool ring field sound system is another-specific embodiment diagram. , And UA and 14B are used to compare the speaker position and the audio effect diagram of the sound processing among the previous embodiments of the specific embodiments disclosed herein. Figures 15-1, 15-2, and 15-3 are examples of gain and / or phase transfer functions of the sound processing system according to Figure 16. Figure 6 is a diagram of the sound processing system with the layout shown in Figure 4, and it also shows the possible transfer function characteristics for some processing blocks. Detailed Description of the Preferred Embodiment FIG. 1 is a diagram of a preferred car sound system 100 according to one or more embodiments disclosed herein. In FIG. 1, two speakers 114, 115 are closely adjacent and receive and respond to audio signals 132 and 133 from the sound processor 108, respectively. Loudspeaker states 114 and 115 are better for left and right speakers, which can be basically (but not necessarily) the same, and as further described here, the spacing is' in addition, it can be of any appropriate size and model, which can be obtained in accordance with Car area or other space size restrictions. Furthermore, the speakers 114, 115 may be located on or near the center axis of the interior of the car, such as above the center of a center console or dashboard, or on a central island between the driver and passenger seats. The sound processor 108 receives audio input signals 102 and 103 from a suitable audio signal source 05, which is from any typical car audio component (eg, CD player, cassette player, radio, etc.). Audio input signal 102, -10- This paper standard is applicable to China Standard (CNS) A4 specification (21C) χ 297 公 董-) —
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線 五、發明説明( 7 A7 B7 义可任何音頻產物推得,包含為音頻系統接收之任何先 H %〈媒介(諸如錄音帶、⑶或、任何數位音頻樓或 何·’’、、泉(例如典線電)廣播。聲音處理器108依此處所述較詳 二,技術處理i體聲音信n 1〇3較^圭,並提供經處理之 L f 1/2、133 (在任何所欲之放大或位準偏移後)予緊密相間 之揚聲器對114、U5。亦可視需要將立體信號1〇2、1〇3直接或 、’’二聲曰處理為118 (如欲經某些額外或互補聲音處理)饋送至其 L附加之揚聲态,諸如圖丨所示左揚聲器124及右揚聲器125。 在一較佳具體實施例中,聲音處理器1〇8係用以“擴展,,聲 音影像於較廣之感應區,其係取自兩音頻聲道102、103差、 頻邊交更中間差異信號,並接著在尺寸調整後,將其以適當 極性加入左右聲道中。當揚聲器n4、115位置相倚時,所得 現象使得立體聲音影像顯現,即使揚聲器114、115緊密相鄰 亦然。 由聲音處理器108施行之低音提昇或頻譜權重可能導致相 位偏移,可利用相位均衡補償之。可在混合(亦即交互抵消) 前,沿音頻聲道102、103施行互補相位補償,使得左右音頻 聲道102、103大致與頻譜變更之差異信號同相。利用線性相 位濾波芜成低音提昇或頻譜權重處無需或無欲相位均衡, 然而將均等延遲加入左右音頻聲道路徑中較佳,俾補償在 差異聲道中,因線性相位均衡器產生之額外延遲。揚聲器 114、115之主要目的無需與習知中央位置揚聲器般僅提供單 聲道資訊(雖然可將單聲道資訊饋送至揚聲器114、115),而係 當與適當之中高頻處理與混合時(藉由聲音處理器1〇8),產生 -11 - 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐) 576121 A7 ___ —_ B7 五、發明説明(,) 王體聲資訊之對稱散播,使得左右乘客^ ^ ^ 體呈現,與胯聽軸無涉。 an 由於兩中央揚聲器U4、115係緊密相間,抵達各聽者之聲 音資訊時間差最低,為各聽者感知來自兩揚聲器之相對: 量亦近乎相同。此外,左右乘客感覺來自中央揚聲器對⑴曰、 1151晋量近乎相同。在緊密相鄰之揚聲器因交互抵消處理 而無法發射有力之大反向、低頻分量的狀況下,可藉由低通 濾波器隔絕過低頻率,並將之引向隔離次低音擴聲器,同時 可利用對應之高通濾波器避免高位準、低頻信號使得較小 的揚聲器超載。對相當小的中央揚聲器1M、U5而言,任何 低首音頻部均不易掌控,可將左右音頻聲道1〇2、1〇3分別饋 送土左右低g輪聲器121與122,並可併同由聲音處理器mg戈 任何其它適當裝置提供之中/高頻衰減及/或低/低音頻提昇。 在中/高頻係自緊密相間之中央揚聲器對輸出,而低音或低 頻係自左右車門鑲嵌之揚聲器輸出的具體實施例中,因以 %源較低即可貫現較鬲音量,故具放大效率上的優點。 當揚聲器114、115係位為前操作台或儀表板,或在汽車中 央軸上或接近時,可(但非必要)將其固定於夠高處,俾具至 聽者耳部之相對無干擾徑,消弭與諸如座椅及乘客身體之 障礙物有關之包裹或消減。在此類具體實施例中,揚聲器 114、115係位於一理想上或至少較佳之音頻位置,其障礙及 反射較低,並可使聲音展延空間較大。 即將描述與緊密相間之揚聲器相連之聲音處理器之較佳 技術相關細節。圖3係依此處所揭具體實施例之聲音處理系 -12- 本紙張尺度適用巾s S家標準(CNS) A4規格(210 X 297公爱 1 —Line V. Description of the invention (7 A7 B7 can be derived from any audio product, including any media received by the audio system (such as audio tapes, CDs, or any digital audio building or Ho ...), Quan (such as (Code wire) broadcast. The sound processor 108 is described in more detail here. The technical processing of the body sound signal n 103 is more detailed, and provides processed L f 1/2, 133 (in any desired After amplification or level shift) to closely spaced speaker pairs 114, U5. If necessary, the stereo signal 102, 103 can also be processed directly or, `` two sounds '' to 118 (if some additional Or complementary sound processing) is fed to its L-added speaker states, such as left speaker 124 and right speaker 125 shown in Figure 丨. In a preferred embodiment, the sound processor 108 is used to "extend, The sound image is in the wider sensing area, which is taken from the difference between the two audio channels 102 and 103, and the frequency difference crosses the middle difference signal, and then after the size adjustment, it is added to the left and right channels with appropriate polarity. When the speaker When the positions of n4 and 115 are different, the obtained phenomenon makes the stereo sound and video display , Even if the speakers 114, 115 are closely adjacent. The bass boost or spectral weighting performed by the sound processor 108 may cause phase shifts, which can be compensated using phase equalization. It can be used along the audio before mixing (that is, interactive cancellation). Channels 102 and 103 perform complementary phase compensation, so that the left and right audio channels 102 and 103 are approximately in phase with the difference signal of the spectrum change. Linear phase filtering is used to make bass boost or spectrum weighting unnecessary or undesired. However, equal delay is added. The left and right audio channel paths are better, 俾 compensate for the additional delay caused by the linear phase equalizer in the difference channels. The main purpose of the speakers 114, 115 is not to provide mono information only as is the case with conventional center speakers (although Mono information can be fed to the speakers 114, 115), and when processed and mixed with the appropriate mid-high frequency (by the sound processor 108), -11-This paper size applies to the Chinese National Standard (CNS ) A4 size (210 X 297 mm) 576121 A7 ___ —_ B7 V. Description of the invention ^ ^ ^ Body presentation, has nothing to do with the listening axis. An Because the two central speakers U4, 115 are closely spaced, the time difference between the sound information arriving at each listener is the lowest, and the relative perception of each listener from the two speakers: the amount is also nearly the same In addition, the left and right passengers feel that they are almost the same from the center speaker, and the amount of 1151 is almost the same. In the situation that the closely adjacent speakers cannot emit powerful large reverse and low-frequency components due to interactive cancellation processing, low-pass filtering can be used The device isolates too low frequencies and leads it to the isolated subwoofer. At the same time, the corresponding high-pass filter can be used to avoid high-level and low-frequency signals overloading smaller speakers. For the relatively small center speakers 1M and U5, any low-head audio section is not easy to control. The left and right audio channels 10 and 10 can be fed to the left and right low-g wheel speakers 121 and 122, and can be combined. Any other suitable device provided by the sound processor mg Ge provides medium / high frequency attenuation and / or low / low audio boost. In the specific embodiment where the middle / high frequency is output from the closely-spaced center speaker pair, and the bass or low frequency is output from the speaker inlaid on the left and right door, the louder volume can be achieved with a lower% source, so it is amplified. Efficiency advantages. When the speakers 114 and 115 are located on the front console or dashboard, or on or near the center axis of the car, they can be fixed (but not necessarily) high enough to be relatively undisturbed from the ears of the listener It eliminates the wrapping or mitigation of obstacles such as seats and passengers. In such a specific embodiment, the speakers 114, 115 are located at an ideal or at least better audio position, which has lower obstacles and reflections, and can make the sound spreading space larger. Details of preferred technical aspects of a sound processor connected to closely spaced speakers will be described. Figure 3 is the sound processing system according to the specific embodiment disclosed here. -12- This paper size is suitable for towels, S Standards (CNS) A4 specifications (210 X 297 public love 1 —
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線 576121 A7 __B7_ 五、發明説明(9 ) 統300方塊簡圖,例如可連結圖1之汽車聲音系統100及揚聲器 配置使用,或更廣而言之,在任何利用多音頻聲道提供立體 源信號之聲音系統中。如圖3所示,將一左頻信號311及右音 頻信號312供予聲音處理器310,接著供至緊密相間之揚聲器 對324、325。亦可將左頻信號311及右音頻信號312供予左右側 (環場或非環場)揚聲器,未示於圖3。在一較佳具體實施例中 ,聲音處理器310產生來自左右聲道音頻信號311、312之頻譜 權重差異信號,並在將所得之信號送至揚聲器對324、325前 ,先將頻譜權重差異信號(位適當極性而調整)與左右聲道音 頻信號311、312混合,俾提供交互抵消效應,藉此擴展由揚 聲器324、325產生之聲音影像,即使揚聲器對324、325係緊密 相鄰,亦可提供立體聲效。 圖4係依此處所揭各原則之聲音處理系統400細部圖示,例 如可連結圖1之汽車聲音系統100及揚聲器配置使用,或更廣 而言之,在任何利用多音頻聲道提供立體源信號之聲音系 統中。在圖4之聲音處理系統400中,一左音頻信號411及右音 頻信號412係自音頻源提供,並可將之饋送至其它揚聲器(未 示於圖4)。左音頻信號411與右音頻信號412差係利用減法器 440取得,並將差異信號441饋送至頻譜權重濾波器442,於該 處對差異信號441施予頻譜權重(可為一增益因子)。頻譜權重 濾波器442特性可視數個因素而變,包括所欲之聽覺效果、 揚聲器424、425間距、聽者好惡等。頻譜權重濾波器442可輸 出至相位均衡器445,用以補償頻譜權重濾波器442所致之相 位偏移(如非線性)。 -13- 本紙張尺度適用中國國家標準(CNS) A4規格(210X 297公釐)Line 576121 A7 __B7_ V. Description of the invention (9) System 300 block diagram, for example, can be connected to the car sound system 100 and speaker configuration of Figure 1, or more broadly, to provide stereo source signals in any multi-audio channel Sound system. As shown in Fig. 3, a left-frequency signal 311 and a right-audio signal 312 are supplied to the sound processor 310, and then supplied to closely spaced speaker pairs 324, 325. The left-frequency signal 311 and the right audio signal 312 can also be supplied to the left and right (ring field or non-ring field) speakers, which are not shown in FIG. 3. In a preferred embodiment, the sound processor 310 generates the spectrum weight difference signals from the left and right channel audio signals 311 and 312, and sends the spectrum weight difference signals before sending the obtained signals to the speaker pairs 324 and 325. (Adjusted with proper polarity) Mix with left and right channel audio signals 311 and 312 to provide interactive cancellation effect, thereby expanding the sound image produced by speakers 324 and 325, even if the speaker pairs 324 and 325 are closely adjacent, it can also Provides stereo effect. FIG. 4 is a detailed illustration of a sound processing system 400 according to the principles disclosed herein. For example, it can be used in conjunction with the car sound system 100 of FIG. 1 and the speaker configuration, or more broadly, to provide a stereo source in any multi-audio channel. Signal sound system. In the sound processing system 400 of Fig. 4, a left audio signal 411 and a right audio signal 412 are provided from an audio source and can be fed to other speakers (not shown in Fig. 4). The difference between the left audio signal 411 and the right audio signal 412 is obtained by the subtractor 440, and the difference signal 441 is fed to the spectrum weight filter 442, where the difference signal 441 is given a spectrum weight (which may be a gain factor). The characteristics of the spectral weighting filter 442 may vary depending on several factors, including the desired auditory effect, the spacing of the speakers 424, 425, and the likes and dislikes of the listener. The spectral weight filter 442 can be output to a phase equalizer 445 to compensate for a phase offset (such as non-linearity) caused by the spectral weight filter 442. -13- This paper size applies to China National Standard (CNS) A4 (210X 297mm)
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線 576121 A7 B7 五、發明説明(Π ) 在一較佳具體實施例中,輸入信號XI與Χ2係表左右音頻 聲道輸入之Ζ-轉換,而Υ1與Υ2則係表與饋送至緊密相鄰之揚 聲器對(例如左右揚聲器)之左右聲道輸出對應Ζ-轉換。轉換 函數A、一Α與Β可以ζ項表之,並且部分為與數位域中處理有 關之取樣頻率Fs所決定。依一特殊具體實施例,區塊555與 556均為f=3200Hz、Q = 0.12之第二級全通濾波器,在一示例中並 可根據取樣頻率Fs之代表性示例而存在下列轉換函數特性: 對 Fs = 48 KHz, 一 0.2578123-0.6780222Z·1 +f2 A(z) 1-0.6780222^^-0.2578123^ 對 Fs = 44.1 KHz, A(z): 一 0.2944196 - 0.633509厂1 + 厂2 1 - 0.633509Z*1 - 0.2944196ζ'2 裝 對 Fs = 32 KHz, 一 0.4201395 - 0.469117 1-0.469117厂1 - 0.4201395厂2 在此特殊具體實施例中,區塊560可為在低頻時增益為0 dB且 截止頻率為200 Hz與2 KHz之第一級架,並與第二級全通濾波 器(f= 125 Hz、Q = 0.12)串接,在一示例中,並可根據取樣頻率Fs 之代表性示例而存在下列轉換函數特性: 對 Fs = 48 KHz, …、广 0.1116288-0.0857871 厂1 0.8723543-1.872104广 + z_2 B(z) = G χ-:-χ l-0.9741583z·1 一 1.872104厂1 +0.8723543厂2 對 Fs = 44.1 KHz, -17- 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐) 576121 A7 B7 五、發明説明(丨4 0.1126427 - 0.0845478Z—1 ^ 0.8618468-1.861552厂1 +z_2 ⑺一 X 卜 0.9719051尸丨 X 1 -1.861552厂^ + 0.8618468 厂2 對 Fs = 32 KHz, 〜、n 0.1173312-0.0788175^1 0.814462-1.813915^1 + 厂2 B(z) -Gx---;-x-;-Γ 卜 0.9614863厂1 1 一 1.813915厂1 + 0.814462^2 在區塊560亦可包含一增益項,或者其可在做為相異區塊或 構件之相同路徑中。增益值可藉由對一特述應用之實驗決 定之,但一般均期在10-15 dB範圍内最佳化。例如在一具體實 施例中,增益項為12 dB。 圖7A與7B係依圖5聲音處理系統之頻率響應及相位轉換函 數示例圖,其並具特殊頻譜權重、均衡及相位補償特性。圖 7A闡示對一 B/A之頻率響應轉換函數702及相位轉換函數705, 其係表差異聲道(一B)以及加入+ 12 dB增益之第一輸入聲道(XI) 之轉換函數。如圖7A所示,頻率響應轉換函數702在基頻之 第一區710增益相當平緩(在此示例中,上至約2〇〇 Hz),在中 頻之第二區711中增益下降(在此示例中,自約2〇〇 Hz至約2 KHz) ’以及在高頻之第三區712中增益再度相當平緩(在此示例中 ,上至約2 KHz)。相位響應轉換函數705係指在中頻之第二區 711中(亦即在約2〇〇 Hz至約2KHz間),輸出信號大致保持同相。 圖7B闡釋對—b/ — a之頻率響應轉換函數727及相位轉換函 數725 ’其係表差異聲道(一b)以及加入+ 12 dB增益之第一輸入 聲道(X2)之轉換函數。在圖7B中,如圖7A所示,頻率響應轉 換函數727在基頻之第一區720增益相當平緩(在此示例中,上 至約200 Hz),在中頻之第二區721中增益下降(在此示例中, -18- 本纸張尺度適用中國國家標準(CNS) A4規格(21〇x 297公釐)Line 576121 A7 B7 V. Description of the Invention (Π) In a preferred embodiment, the input signals XI and χ2 are the ZO-conversion of the left and right audio channel inputs, while Υ1 and Υ2 are the table and feed closely adjacent The left and right channel outputs of a speaker pair (such as left and right speakers) correspond to Z-conversion. The conversion functions A, A, and B can be expressed in terms of ζ terms, and are partially determined by the sampling frequency Fs related to processing in the digital domain. According to a specific embodiment, blocks 555 and 556 are second-stage all-pass filters with f = 3200Hz and Q = 0.12. In one example, the following transfer function characteristics can be present according to a representative example of the sampling frequency Fs. : For Fs = 48 KHz, 0.2578123-0.6780222Z · 1 + f2 A (z) 1-0.6780222 ^^-0.2578123 ^ For Fs = 44.1 KHz, A (z): 0.2944196-0.633509 Factory 1 + Factory 2 1- 0.633509Z * 1-0.2944196ζ'2 for Fs = 32 KHz, 0.4201395-0.469117 1-0.469117 Factory 1-0.4201395 Factory 2 In this specific embodiment, the block 560 may be 0 dB at low frequency and The first stage with cut-off frequencies of 200 Hz and 2 KHz is connected in series with the second-stage all-pass filter (f = 125 Hz, Q = 0.12). In one example, it can be based on the representativeness of the sampling frequency Fs. For example, the following conversion function characteristics exist: For Fs = 48 KHz,…, 0.1116288-0.0857871 factory 1 0.8723543-1.872104 factory + z_2 B (z) = G χ-: -χ l-0.9741583z · 1-1.872104 factory 1 + 0.8723543 Factory 2 pairs of Fs = 44.1 KHz, -17- This paper size applies to China National Standard (CNS) A4 specifications (210 X 297 mm) 576121 A7 B7 Description of the invention 1 0.814462-1.813915 ^ 1 + factory 2 B (z) -Gx ---; -x-; -Γ Bu 0.9614863 factory 1 1-1.813915 factory 1 + 0.814462 ^ 2 may also include a gain term in block 560, or It can be in the same path as different blocks or components. The gain value can be determined by experiments on a specific application, but the average period is generally optimized in the range of 10-15 dB. For example, a specific In the embodiment, the gain term is 12 dB. Figs. 7A and 7B are examples of frequency response and phase conversion functions of the sound processing system according to Fig. 5, and they have special spectral weighting, equalization, and phase compensation characteristics. FIG. 7A illustrates a frequency response conversion function 702 and a phase conversion function 705 for a B / A, which are conversion functions of a difference channel (−B) and a first input channel (XI) with a gain of + 12 dB. As shown in FIG. 7A, the frequency response conversion function 702 has a relatively smooth gain in the first region 710 of the fundamental frequency (in this example, up to about 200 Hz), and the gain decreases in the second region 711 of the intermediate frequency (in In this example, from about 2000 Hz to about 2 KHz) 'and the gain in the third region 712 of the high frequency is quite flat again (up to about 2 KHz in this example). The phase response transfer function 705 refers to that in the second region 711 of the intermediate frequency (that is, between about 200 Hz and about 2 KHz), the output signal remains substantially in phase. Fig. 7B illustrates the frequency response conversion function 727 and phase conversion function 725 'for -b / -a, which are the conversion functions of the difference channel (a) and the first input channel (X2) with a gain of + 12 dB. In FIG. 7B, as shown in FIG. 7A, the frequency response conversion function 727 has a fairly flat gain in the first region 720 of the fundamental frequency (up to about 200 Hz in this example), and a gain in the second region 721 of the intermediate frequency. Decrease (in this example, -18- this paper size applies to China National Standard (CNS) A4 specifications (21 × 297 mm)
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576121 A7 B7 五、發明説明(15 ) 自約200 Hz至約2 KHz),以及在高頻之第三區722中增益再度 相當平緩(在此示例中,高於2 KHz)。相位響應轉換函數725係 指在中頻之第二區721中(亦即在約200 Hz至約2 KHz間),輸出 信號大致保持反相(亦即180度)。 如上述,將輸出信號Yl、Y2送至緊密相鄰之揚聲器對較佳 。轉換函數A、一 A與B係自揚聲器大致相鄰之條件下所選之 示例。但可自圖5系統500或此處所述其它具體實施例中獲利 ,其中揚聲器對並未直接相接,而係緊密相鄰。 圖10係依此處所述另一具體實施例之聲音處理系統1000, 其可在線性頻譜權重濾波器中使用。在圖10之聲音處理系統 1000中,一左音頻信號1011與右音頻信號1012經處理推得之一 對經處理之音頻信號1048、1049送至一對緊密相間之揚聲器 1024、1025 (例如左右揚聲器)。左右音頻信號1011、1012經減 法器1040操作輸出代表左右音頻信號1011、1012差之差異信號 1041。差異信號1041經饋送至具線性相位特性之頻譜權重濾 波器1042。頻譜權重濾波器1042之頻率響應特性一般係依如 圖7A或7B所示轉換函數而定。由於頻譜權重濾波器1042具線 性相位特性,故相位均衡及補償即無所需。因此,頻譜權重 濾波器1042可直接輸出至交互抵消電路1046,其接著在將頻 譜權重信號饋至揚聲器1024、1025前,將其與左右音頻聲道 混合。為補償頻譜權重濾波器1042導致之延遲,可分別沿左 右聲道路徑加入延遲部件1055與1056。延遲部件1055、1056具 與線性頻譜權重濾波器1042之潛伏期相等之延遲性較佳。 在各具體實施例中由聲音處理提供之交互抵消量一般係 -19- 本紙張尺度適用中國國家標竿(CNS) A4規格(210 X 297公釐)576121 A7 B7 V. Description of the invention (15) From about 200 Hz to about 2 KHz), and the gain in the third region 722 of the high frequency is quite smooth again (in this example, higher than 2 KHz). The phase response transfer function 725 means that in the second region 721 of the intermediate frequency (that is, between about 200 Hz and about 2 KHz), the output signal remains approximately inverted (that is, 180 degrees). As mentioned above, it is better to send the output signals Y1, Y2 to the closely adjacent speaker pairs. The transfer functions A, A and B are examples selected under the condition that the speakers are approximately adjacent. However, it may be profitable from the system 500 of FIG. 5 or other specific embodiments described herein, in which the speaker pairs are not directly connected, but are closely adjacent. FIG. 10 is a sound processing system 1000 according to another embodiment described herein, which can be used in a linear spectral weight filter. In the sound processing system 1000 of FIG. 10, a left audio signal 1011 and a right audio signal 1012 are processed and pushed, and a pair of processed audio signals 1048 and 1049 is sent to a pair of closely spaced speakers 1024 and 1025 (for example, left and right speakers). ). The left and right audio signals 1011 and 1012 are operated by a subtractor 1040 to output a difference signal 1041 representing the difference between the left and right audio signals 1011 and 1012. The difference signal 1041 is fed to a spectral weight filter 1042 having a linear phase characteristic. The frequency response characteristic of the spectral weight filter 1042 is generally determined by a transfer function as shown in Fig. 7A or 7B. Because the spectral weight filter 1042 has a linear phase characteristic, phase equalization and compensation are not required. Therefore, the spectral weight filter 1042 can be directly output to the cross-cancellation circuit 1046, which then mixes the spectral weight signal with the left and right audio channels before feeding the spectral weight signal to the speakers 1024, 1025. To compensate for the delay caused by the spectral weight filter 1042, delay components 1055 and 1056 can be added along the left and right channel paths, respectively. The delay components 1055 and 1056 have better delay characteristics which are equal to the latency of the linear spectral weight filter 1042. The amount of interactive offset provided by sound processing in each specific embodiment is generally -19- This paper size applies to China National Standard (CNS) A4 (210 X 297 mm)
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線 576121 A7 B7 五、發明説明(Π ) 能一背板23卜為實現兩揚聲器214、215間之隔離,可在揚聲 器214、215間置放如圖2A與2B所示内壁216,藉此產生兩隔離 揚聲器腔,分別罩住兩揚聲器214、215。 揚聲器對214、215可直接面向前方,但在此示例中,揚聲 器214、215係朝下,如圖2A所示。以此方向置放時,狹縫219 可位於揚聲器箱201底部,俾使揚聲器214、215之聲音朝向車 中聽者發射。接著揚聲器214、215僅有效佔用狹縫219尺寸大 小之表面空間。在一車内環境中,前操作台/儀表板空間因 不足而更需珍惜,故可將兩揚聲器214、215置於前操作台/儀 表板空間,同時將所耗表面空間減至最低係極大優點。音頻 系統控制/顯示或其它習知操作台配備(控制、LCD或其它顯 示、通風口等)可接合或整合於揚聲器箱201之前板232上,使 得前板232表面空間得到充分利用。 此外,以此方向置放時,揚聲器214、215尺寸可大些(假設 操作台空間受限);例如:各揚聲器可為約4”(共8”),適於8” DIN空間,然而如揚聲器係面向前,則一般均小於2 %’’,俾適 於DIN空間。因此在中央揚聲器單元置放較大揚聲器,俾使 低音再生之能力降低或可視側邊(例如車門鑲嵌)低音揚聲器 實行左右聲道之低音資訊需要而免除。 揚聲器214、215面向下之幅向效應概念釋如圖2D,其顯示 一向下朝向一表面291之一般揚聲器290。揚聲器290之聲音輸 出自中央點沿表面291向外所有方向發射(亦即完整的360度) 。故如圖2A與2C所示,狹縫219位於揚聲器箱201底部較佳, 俾使揚聲器214、215之聲音朝向車中聽者發射。在揚聲器214 -21 - 本紙張尺度適用中國國家標準(CNS) A4規格(210X 297公釐)Line 576121 A7 B7 V. Description of the invention (Π) A back plate 23 can be used to realize the isolation between two speakers 214 and 215. An inner wall 216 as shown in FIGS. 2A and 2B can be placed between the speakers 214 and 215, thereby generating Two isolated speaker cavities respectively cover the two speakers 214 and 215. The speaker pairs 214, 215 may face directly forward, but in this example, the speakers 214, 215 are facing down, as shown in Figure 2A. When placed in this direction, the slit 219 may be located at the bottom of the speaker box 201, so that the sound of the speakers 214, 215 is emitted toward the listener in the car. Then the speakers 214, 215 effectively occupy only the surface space of the size of the slit 219. In an in-vehicle environment, the front console / dashboard space needs to be cherished because of insufficient space. Therefore, two speakers 214 and 215 can be placed in the front console / dashboard space while minimizing the surface space consumed. This is a great advantage. . The audio system control / display or other conventional operation console equipment (control, LCD or other display, vents, etc.) can be joined or integrated on the front panel 232 of the speaker box 201, so that the surface space of the front panel 232 can be fully utilized. In addition, when placed in this direction, the speakers 214, 215 can be larger (assuming the space of the console is limited); for example: each speaker can be about 4 ”(total 8”), suitable for 8 ”DIN space, but if The front speakers are generally less than 2% '', which is suitable for DIN space. Therefore, placing a larger speaker in the center speaker unit will not reduce the ability of bass reproduction or the visible side (such as door inlay) woofer implementation. The bass information of the left and right channels need to be eliminated. The concept of the downward-direction amplitude effect of the speakers 214 and 215 is illustrated in FIG. 2D, which shows a general speaker 290 facing down to a surface 291. The sound of the speaker 290 is output from the center point along the surface 291 It is emitted in all directions (that is, a complete 360 degrees). Therefore, as shown in FIGS. 2A and 2C, the slit 219 is preferably located at the bottom of the speaker box 201, so that the sound of the speakers 214 and 215 is emitted toward the listener in the car. Speaker 214 -21-This paper size applies to China National Standard (CNS) A4 (210X 297 mm)
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線 五、發明説明(18 、215外圍配置一隔絕層212 (例如泡沫材料)較佳,如。' 示,其可位於揚聲器箱201内,俾使聲音不致為揚聲°】== 背板231 (如有)反射。在所得之揚聲器箱配置中’自^ 214、215發射之聲音清楚地經狹縫219投射於車中聽者。 在另一具體實施例中,揚聲器214、215可向上而非向下, 而狹縫2i9則位於揚聲器箱2〇1上方,俾實現類似效應i視需 要可將揚聲器214、215置於側邊,彼此與狹縫219面對或背對 均可,而一對狹縫(對每一揚聲器2丨4、215各一)方向則為=立 而非水平。在此一具體實施例中,揚聲器箱可較高但較有些: 在某些環境下,圖2A.2C所示揚聲器箱配f中之高頻(諸如 超過2 KHz)部分可能喪失或降低。因此,將一或多個小尺寸 之附加揚聲器217置於揚聲器214、215之“喇叭口,,上方極揚聲 器箱201前板232中,即有可發射較高頻率的優點。 雖然圖2A-2C所示揚聲器箱2〇1具有某些置放於車内標準 DIN空間之優點,應瞭解緊密相間之揚聲器丨丨4、丨丨5是否係置 於揚聲器箱201内,其亦可位於車内其它區域,諸如前儀表 板上、後椅背上方,或在中央操作台中或在前座間或前與後 座間之隔絕島中。緊密相間之揚聲器114、115位於汽車中央 軸或接近之較佳,俾均句提供最佳聲質至兩側。 文限於車内2間,中央揚聲器(例如圖1之揚聲器114、115) 尺寸因而受限。但較小的揚聲器在低頻會有損失。為補償小 ^央揚聲器對低頻部之損《,可將左右低音揚聲器(例如揚 戽器124、125)置於適當位置,例如建於車門内。饋送至左右 低晋音頻部之左右音頻聲道可經處理,使中/高頻衰減及域 - 22 · 本紙張尺度適财國a家標準(CNS) A4規格(21G x -------- 576121 A7 --_________ B7 五、發明説明(θ ) ^昇低音音頻部。經車門揚聲器提供之低音頻率將不會抵 損由中央揚聲器對提供之中/高頻立體音效,此係因廣為人 知之100 Hz以下之低頻一般不會為人所感知。 此外如糾述’可在車内適當位置加入一次低音擴音器, 俾再強化超低頻低音音頻部。例如此低音擴音器可位於後 ★月上方之後操作台,或在任何其它適當位置。 在某些情況下,車内後座區之乘客可能實際感覺之聲質 優於前方乘客,此係因其具立體聲源(亦即中央前揚聲器對) 車又返。可再做各種修改,使得提供前座乘客之聲質更為改盖 例如亦了將位於別操作台或區域之類似緊密相間揚聲器 對置於車内後方,例如在後置物架上或其内。可將用以饋送 前f緊密相間揚聲器對之相同信號饋送予後方緊密相間揚 聲器對。如有所需,可將内含緊密相間揚聲器對之揚聲器箱 2〇1置於x通工具後方,俾罩住後揚聲器,示如圖2A-2C。 圖9A係汽車900頂視簡圖,用以闡釋汽車9〇〇前段中緊密相 間揚聲器對905 (例如在前操作台或前儀表板中)之位置示例 ,其附加車門鑲嵌之揚聲器907、908,俾提供如附加低音或 低頻音頻部。圖9B闡釋與圖从類似示例,但在汽車92〇後方 加入一對緊密相間之揚聲器93〇 (位於揚聲器箱内與否均可) 。圖9C鬧釋在諸如大型豪華轎車等駕驶與乘客隔離之大型交 通工具中之揚聲器置放示例,在駕駛與乘客艙941中,其佈 局與圖9A類似,在交通工具940具有在前區(例如操作台、儀 表或類似處)的一對緊密相間揚聲器945,以及一對車門鑲嵌 之左右揚聲器947、948。在乘客艙942中之佈局與圖9B類似, -23- 576121Line V. Description of the invention (18, 215 is equipped with an insulation layer 212 (such as foam material) on the periphery, such as. ', It can be located in the speaker box 201 so that the sound is not raised. °] == 背板 231 (If any) reflection. In the resulting speaker box configuration, the sound emitted by 'from ^ 214, 215 is clearly projected to the listener in the car through the slit 219. In another specific embodiment, the speakers 214, 215 may be upward and It is not downward, and the slit 2i9 is located above the speaker box 201. To achieve a similar effect, i.e., speakers 214, 215 can be placed on the side if necessary, facing each other or facing away from the slit 219. For the slits (one for each speaker 2 and 4 and 215), the direction is vertical rather than horizontal. In this specific embodiment, the speaker box may be taller but more somewhat: under certain circumstances, Figure 2A The high frequency (such as more than 2 KHz) part of the speaker box with f.2C may be lost or reduced. Therefore, place one or more additional speakers 217 of small size in the "flare," above the speakers 214, 215, above In the front panel 232 of the loudspeaker box 201, there is an advantage that higher frequencies can be transmitted. However, the speaker box 201 shown in FIGS. 2A-2C has some advantages of being placed in a standard DIN space in the car. It should be understood whether the closely spaced speakers 丨 4 and 丨 5 are placed in the speaker box 201, which can also be Located in other areas of the car, such as the front dashboard, over the back of the back seat, or in the center console or in the island between the front seat or the front and rear seats. The closely spaced speakers 114, 115 are located on or near the center axis of the car The sound quality is limited to two sides in the car. The size of the center speakers (such as speakers 114 and 115 in Figure 1) is limited. However, the smaller speakers have a loss at low frequencies. To compensate The damage to the low-frequency part of the small central speaker can be placed in an appropriate position, such as a speaker, 124, 125, such as built in the car door. The left and right audio channels fed to the left and right low-frequency audio section can be used. Processing, so that the medium / high frequency attenuation and range-22 · This paper is suitable for a country's standard (CNS) A4 specification (21G x -------- 576121 A7 --_________ B7 V. Description of the invention (θ ) ^ Lift bass audio section. Provided via door speaker The bass frequency will not be detrimental to the middle / high-frequency stereo sound provided by the center speaker pair. This is generally not known as low frequencies below 100 Hz. In addition, if you add a comment, you can add it once in the appropriate place in the car Bass amplifier, and then strengthen the low-frequency bass audio section. For example, this bass amplifier can be located in the rear console above the rear, or in any other appropriate position. In some cases, passengers in the rear seat area of the car may The actual sound quality is better than the front passenger. This is because it has a stereo source (that is, the center front speaker pair). The car is back. Various modifications can be made to make the front passenger sound quality even better. Similar, closely spaced speakers located on other consoles or areas are placed behind the car, such as on or in a rear rack. The same signal used to feed the front f close phase speaker pair can be fed to the rear close phase speaker pair. If necessary, the speaker box 201 containing the closely spaced speaker pair can be placed behind the x-pass tool, and the rear speaker is covered, as shown in Figure 2A-2C. FIG. 9A is a schematic top view of a car 900 for explaining an example of the position of the closely spaced speaker pair 905 (for example, in the front console or the front dashboard) in the front section of the car 900, with door-mounted speakers 907, 908 added,俾 Provides such as additional bass or low frequency audio section. Figure 9B illustrates a similar example from the figure, but with a pair of closely spaced speakers 93o (located in the speaker box or not) behind the car 92o. FIG. 9C illustrates an example of speaker placement in a large vehicle such as a large limousine, which is isolated from driving and passengers. In the driving and passenger compartment 941, its layout is similar to that of FIG. Console, instrument, or the like), a pair of closely spaced speakers 945, and a pair of left and right speakers 947, 948 inlaid on the door. The layout in passenger compartment 942 is similar to Figure 9B, -23- 576121
具有兩對分別在乘客艙942前後區中緊密相間之揚聲器%” 960,並具一對左右車門鑲嵌之揚聲器957、958。當然,在任 一此類示例中,均可在車内空間限制、成本等考量下,根據 個別需求及喜好添加任意數量之揚聲器與音頻部件。 在某些應用中,欲在汽車系統中具有環場聲或其它多聲 遥功能,併同先前在此敘述之緊密相間揚聲器配置。例如: 可對車内乘客表現數位音頻視聽媒體而具DVD系統之箱型車 或其它大型車輛,具經汽車音頻系統播放之聲音。在其它狀 況下,如欲具極左與右方向聲音,可在紀錄媒介上存在左右 環場聲道,或僅在左右聲道之相對音量上存在極端與刻意 之不對稱。 在圖11中闡釋一汽車聲音系統1100示例方塊圖,俾提供可 改善之極右/左聲音,併同緊密相間之中央揚聲器對m4、 1115。此處所示系統lioo之運作大多與圖1中與緊密相間之中 央揚聲器對1114、1115有關之聲音系統1〇〇相同,可對車内乘 客產生較廣立體環場影像之幻覺。此外,聲音系統丨1〇〇闡釋 左右音頻信號1102、1103之饋送至左右車門鑲嵌揚聲器丨丨24、 1125,其視需要可分別經低通濾波器1181、1182饋送,俾強化 低音音調。為產生極端左/右聲音,對緊密相間之揚聲器1 ^ 、1115著實不易,左右音頻聲道1102、1103間差距的一部份(以 增益因數k示之)經混合於饋送至左右車門鑲嵌揚聲器1124、 1125之信號可略之。但隨著左右音頻聲道1102、1103間差距之 增加,饋送至左右聲道之信號(視何聲道較大)亦隨之增加(視 喜好而為線性或非線性)。左右音頻聲道1102、1103間差距大 -24- 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐) 裝 訂There are two pairs of closely spaced speakers 960 "in the front and rear areas of the passenger compartment 942, and a pair of left and right door inlaid speakers 957, 958. Of course, in any of these examples, it is possible to limit space in the car, cost, etc. Under consideration, add any number of speakers and audio components according to individual needs and preferences. In some applications, you want to have ring-field sound or other multi-sound remote functions in the car system, and the tightly-spaced speaker configuration previously described here For example: A box-type car with DVD system or other large vehicles that can display digital audiovisual media to passengers in the car, with sound played by the car audio system. In other situations, if you want to have extreme left and right sound, you can There are left and right ring field channels on the recording medium, or extreme and deliberate asymmetry only in the relative volume of the left and right channels. An example block diagram of a car sound system 1100 is illustrated in FIG. Sound, and closely spaced center speaker pair m4, 1115. The operation of the system lio shown here is mostly similar to that in Figure 1 The central speaker has the same sound system 100 related to 1114 and 1115, which can generate the illusion of a wider stereoscopic field image for passengers in the car. In addition, the sound system 丨 100 explains the left and right audio signals 1102 and 1103 are fed to the left and right door mosaic Speakers 丨 丨 24, 1125, which can be fed through low-pass filters 1181 and 1182, respectively, to enhance the bass tone. In order to produce extreme left / right sound, it is not easy for the closely spaced speakers 1 ^, 1115, left and right audio sound Part of the gap between channels 1102 and 1103 (indicated by the gain factor k) is mixed by the signal fed to the left and right door mosaic speakers 1124 and 1125. However, as the gap between the left and right audio channels 1102 and 1103 increases , The signal fed to the left and right channels (depending on which channel is larger) will also increase (linear or non-linear depending on preferences). The gap between the left and right audio channels 1102 and 1103 is large -24- This paper scale applies to China Standard (CNS) A4 size (210 X 297 mm) Staple
線 576121 A7 B7 五、發明説明(21 ) 係指極左或右聲音,其中在圖11之系統1100中,可成功地為 左右車門鑲嵌揚聲器1124、1125所再生。 另一具體實施例係為車輛可使用之環場或多聲道聲音系 統800,示如圖8區塊型式。如該處所示,聲音系統800可包含 一音頻信號源805,其係左右音頻聲道802、803之來源,而後 饋送至功能與圖1所示聲音處理器108類似之聲音處理器808。 或此處所述與緊密相間之左/右中央揚聲器有關之各式其它 聲音處理器具體實施例。在本示例中,左右音頻聲道802、 803可包括環場聲音格式化媒介之前左與前右音頻信號。環 場聲音格式化媒介之中央音頻信號可與之信號832、833混合 饋送至緊密相間揚聲器814、815,亦可饋送至附加之中央揚 聲器817 (例如:如具有高頻揚聲器)。緊密相間揚聲器814、 815與附加揚聲器817可嵌於或配置於如圖2A-2C所示揚聲器箱 型式與配置。可將環場左與環場右音頻聲道871、872饋送至 環場左右揚聲器824、825 (可為偶極或單極)。環場左右揚聲 器824、825—般保可用以提供週遭聲音。當環場左右音頻聲 道871、872係為單聲道時,可利用熟悉此技藝者所周知之可 調整隔絕,避免信號抵消或類似的聲音惡化。 左右揚聲器834、835可為如車門鑲嵌揚聲器,並可直接饋 予左右音頻聲道802、803,或可僅饋送低音/低頻聲調,可與 極右或左聲音部混合,諸如先前與圖11之聲音系統有關之敘 述。 此外,圖8之聲音系統800可再配置位於車輛後方,附加之 緊密相間揚聲器對(未圖示)。如音頻產物係以7.1環場或類似 -25- 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐) 裝 訂Line 576121 A7 B7 V. Description of the invention (21) refers to the extremely left or right sound. Among them, in the system 1100 of FIG. 11, the left and right door mosaic speakers 1124 and 1125 can be successfully reproduced. Another specific embodiment is a ring field or multi-channel sound system 800 that can be used by a vehicle, as shown in the block type of FIG. 8. As shown there, the sound system 800 may include an audio signal source 805, which is the source of the left and right audio channels 802, 803, and is then fed to a sound processor 808 having functions similar to the sound processor 108 shown in FIG. Or various other specific embodiments of the sound processor related to the closely spaced left / right center speakers described herein. In this example, the left and right audio channels 802, 803 may include left and right audio signals before the ring field sound formatting medium. The central audio signal of the surround sound format medium can be mixed with the signals 832, 833 and fed to the close-spaced speakers 814, 815, or to an additional central speaker 817 (for example, if it has a tweeter). Closely spaced speakers 814, 815 and additional speakers 817 can be embedded in or configured in the speaker box type and configuration as shown in Figures 2A-2C. The ring field left and ring field right audio channels 871 and 872 can be fed to the ring field left and right speakers 824 and 825 (can be dipole or monopole). Surround speakers left and right speakers 824, 825—general security can be used to provide ambient sound. When the left and right audio channels 871 and 872 are mono, the adjustable isolation known by those skilled in the art can be used to avoid signal cancellation or similar sound deterioration. The left and right speakers 834, 835 can be like door mosaic speakers, and can directly feed left and right audio channels 802, 803, or can only feed bass / low-frequency tones, and can be mixed with the extreme right or left sound parts, such as the sound previously shown in Figure 11 System related narrative. In addition, the sound system 800 of FIG. 8 may be further disposed at the rear of the vehicle, and a pair of closely spaced speaker pairs (not shown) may be added. If the audio product is 7.1 ring field or similar -25- This paper size is bound to Chinese National Standard (CNS) A4 (210 X 297 mm) binding
576121 A7576121 A7
聲質改善穩定度範圍較經驗中廣,例如無比較聲音處理之 間,大之揚聲器。結果音頻產品(例如聲軌)在一較廣聲域中 具最佳或經改善之聲效,並且即使當聽者非位於揚聲器配 置中央時’亦可感知聲質之改善。故例如,家庭戲院環場聲 音系統可提供較多聽者具_^品質之聲音,他們無需位於 揚聲器配置中央,即可享受特殊音頻產品之播放。 在任-前述具體實施財,在將來自各音頻源信號之音 頻產物傳播予各揚聲器或其它系、统部件冑,均經推估,可包 含任何本質之任意音頻㈣,諸如對虛擬音頻創作(諸如 DVD或其它數位記錄媒介)之音樂件、聲軌,或任何其它具音 頻部《來源或内容。可自記錄媒介讀取音頻產物,諸如 、卡帶、CD、CD-R〇M,或可以無線接收,以任何可取得之格 式存在,遑論來自廣播或點對點傳輸。音頻產物至少具左聲 道及右聲道資訊較佳(不論解碼與否),但已可包含附加聲道 ,例如可為環場聲音或其它多聲道格式碼,諸如D〇lby_AC3、 DTS、DVD-Audio等。音頻產物亦可包括暫態或永久儲存於供 音頻播放使用格式之數位檔,諸如MP3格式或數位多媒體格 式。 此處所述之各具fa貫施例可利用數位或類比技術,咬其 組合施行之。此處所述之“電路,,項廣含類比部件、分離數位 部件、以微處理器為基或數位信號處理(DSP),或其任意組合 。本發明不以所施行之各聲音處理具體實施例操作中的特 殊方式為限。 雖然在此已以一定較佳或示例性滤波器特性、轉換函數 -27- 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐)The range of sound quality improvement stability is wider than experience, such as no loudspeaker between comparative sound processing. As a result, audio products (such as soundtracks) have the best or improved sound effects in a wider sound field, and can improve sound quality even when the listener is not in the center of the speaker configuration. Therefore, for example, the home theater surround sound system can provide more listeners with high-quality sound. They do not need to be in the center of the speaker configuration to enjoy the playback of special audio products. Incumbent-the foregoing specific implementation, in the transmission of audio products from each audio source signal to each speaker or other system or system components, are estimated to include any essential audio content, such as virtual audio creation (such as DVDs or other digital recording media), audio tracks, or any other source or content with audio. Audio products such as, cassettes, CDs, CD-ROMs can be read from the recording medium, or they can be received wirelessly and exist in any available format, not to mention broadcast or point-to-point transmission. The audio product preferably has at least left and right channel information (whether decoded or not), but can already include additional channels, such as ring-field sound or other multi-channel format codes, such as Dolby_AC3, DTS, DVD-Audio, etc. Audio products may also include digital files that are temporarily or permanently stored in a format for audio playback, such as MP3 format or digital multimedia format. Each of the implementation examples described herein can be implemented using digital or analog techniques and bit combinations. The “circuits” described herein include analog components, discrete digital components, microprocessor-based or digital signal processing (DSP), or any combination thereof. The present invention is not specifically implemented in terms of the sound processing performed. The special method in the example operation is limited. Although some better or exemplary filter characteristics and conversion functions have been used here. 27- This paper size applies to the Chinese National Standard (CNS) A4 specification (210 X 297 mm).
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線 A7Line A7
576121 五、發明説明( 等提供示例,將可暸解任何系統 、卜〜^ _ 千又特殊特性可視特殊 她仃、揚聲器類型、揚聲器相對間距、 手殊 ㈤主、 衣兄狀況及其它此類 因素而足。因此,任何在此提1 n 疋<特疋特性均係供闡釋之 ,而非以之為限。此外,特定部 、 T疋邯件,诸如與各具體實施例有 關之頻譜權重滤波器均為可变外刑能 e h又彳型怨,俾可視個別聲音喜 好調整。 ° 雖然所述之特定系統部件互相“連結,,,應瞭解此類用語 落含任何類型之資料通訊或轉#,不論部件係#際互相連 結,或存在有中介構件與否。將瞭解在不偏離此處所示教導 外’可加入各附加電路或系統部件。 在任何此處所述之具體實施例中,汽車聲音系統中使用 之揚聲器基本上可為被動或主動(亦即具内建或板上放大功 能)。對各揚聲器或揚聲器對之各音頻聲道可經個別放大、 位準偏移、提昇或適當調整。 雖然在此已描述本發明之較佳具體實施例,在不背離本 發明之概念及範疇下,可做諸多變化。在檢視本說明書及圖 式後,對熟悉此技藝者,更可增進對此類變化之瞭解。因此 ,除任何隨附之專利申請範圍之精神及範嚀内,本發明概不 受其限。 -28- 本紙張尺度適用中國國家標準(CNS) A4規格(21〇 X 297公嫠)576,121 V. described invention (to provide examples, will be aware of any system, one thousand Bu ^ _ special visual characteristics and special her Ding, type speaker, a speaker relative spacing, v special master hand, brother clothing and other such factors condition Therefore, any of the characteristics of 1 n 疋 < are mentioned here for explanation, but not limited to it. In addition, specific departments, T 疋 han, such as spectrum weight filtering related to specific embodiments The devices are all variable external tones, and they can be adjusted according to individual sound preferences. ° Although the specific system components described are "connected to each other," it should be understood that such terms include any type of data communication or transfer # , Whether the components are interconnected or intervening components are present or not. It will be understood that additional circuits or system components may be added without departing from the teachings shown here. In any of the specific embodiments described herein, The speakers used in the car sound system can basically be passive or active (that is, with built-in or on-board amplification). Each audio channel of each speaker or speaker pair can be individually amplified Level shift, lift or appropriate adjustment. Although the preferred embodiments of the present invention have been described herein, many changes can be made without departing from the concept and scope of the present invention. After reviewing this specification and drawings, Those skilled in the art can further enhance the understanding of such changes. Therefore, the present invention is not limited by the spirit and scope of any accompanying patent application scope. -28- This paper standard applies to Chinese national standards (CNS) A4 specification (21〇X 297 male)
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US26795201P | 2001-02-09 | 2001-02-09 | |
US33136502P | 2002-01-08 | 2002-01-08 |
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TW576121B true TW576121B (en) | 2004-02-11 |
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TW91102644A TW576121B (en) | 2001-02-09 | 2002-02-08 | Automobile sound system and method of sound reproduction |
TW91102639A TWI238671B (en) | 2001-02-09 | 2002-02-08 | Sound system and method of sound reproduction |
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TW91102639A TWI238671B (en) | 2001-02-09 | 2002-02-08 | Sound system and method of sound reproduction |
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TWI451772B (en) * | 2006-03-13 | 2014-09-01 | Dolby Lab Licensing Corp | Rendering center channel audio |
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US8631327B2 (en) * | 2012-01-25 | 2014-01-14 | Sony Corporation | Balancing loudspeakers for multiple display users |
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TWI451772B (en) * | 2006-03-13 | 2014-09-01 | Dolby Lab Licensing Corp | Rendering center channel audio |
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