发明名称 |
Clipping protection in fixed-width audio mixing |
摘要 |
An apparatus provides both clipping protection and signal level conservation while the system operates in the original width type. The apparatus includes a first shifting unit right shifting a first digital input signal to provide a first shifted signal; a second shifting unit right shifting a second digital input signal to provide a second shifted signal; a combiner combining the first shifted signal and the second shifted signal to provide a combined signal; a soft limiter soft limiting the combined signal by reducing some of the amplitudes of the combined signal to provide a soft limited signal; and a third shifting unit left shifting the soft limited signal to provide an output signal. |
申请公布号 |
US9118296(B2) |
申请公布日期 |
2015.08.25 |
申请号 |
US201313754555 |
申请日期 |
2013.01.30 |
申请人 |
GOOGLE INC. |
发明人 |
Skoglund Jan;MacDonald Andrew John |
分类号 |
H03G5/00;H03G11/00 |
主分类号 |
H03G5/00 |
代理机构 |
Birch, Stewart, Kolasch & Birch, LLP |
代理人 |
Birch, Stewart, Kolasch & Birch, LLP |
主权项 |
1. An apparatus comprising:
a first shifting unit right shifting a first digital input signal by a first shifting amount to provide a first shifted signal, wherein the first digital input signal is of a fixed width data type having a fixed length of x bit integers and wherein the first shifted signal is of the fixed width data type having the fixed length of x bit integers; a second shifting unit right shifting a second digital input signal by the first shifting amount to provide a second shifted signal, wherein the second digital input signal is of the fixed width data type having the fixed length of x bit integers and wherein the second shifted signal is of the fixed width data type having the fixed length of x bit integers; a combiner combining the first shifted signal and the second shifted signal to provide a combined signal, wherein the combiner is combining the first shifted signal and the second shifted signal at a fixed length of y bit integers and wherein the combined signal outputted from the combiner is of the fixed width data type having the fixed length of x bit integers; a soft limiter soft limiting the combined signal by reducing some of the amplitudes of the combined signal to provide a soft limited signal, wherein the soft limiter is soft limiting the combined signal at the fixed length of x bit integers; and a third shifting unit left shifting the soft limited signal to provide an output signal, wherein the output signal is of the fixed width data type having the fixed length of x bit integers, wherein each of the first digital input signal and the second digital input signal is right shifted by a value greater than or equal to 1, wherein the combined signal is left shifted by a value greater than or equal to 1, and wherein the value of y is greater than the value of x. |
地址 |
Mountain View CA US |