Abstract: An amplifier includes a first stage, a second stage coupled to the first stage, and a summation circuit. The first stage is configured to receive an analog input signal, convert the analog input signal to a digital signal, and output an intermediate analog output signal in response to the digital signal. The second stage is configured to output a second analog intermediate output signal based on a scaled pulse width modulation quantization error of the first stage. The summation circuit is configured to combine the first and second analog intermediate output signals to generate an amplified output signal.

Abstract: An amplifier includes first and second stages. The first stage includes an input node for receiving an analog input signal, an analog digital converter for converting the analog input signal to a digital input signal, and a first switching circuit for outputting a first analog intermediate output signal in response to receiving a digital pulse width modulated signal that is based on the digital input signal. The second stage is configured to receive a pulse width modulation quantization error of the first stage, scale the pulse width modulation quantization error of the first stage by a gain factor to produce a scaled pulse width modulation quantization error of the first stage, and output a second analog intermediate output signal based on the scaled pulse width modulation quantization error of the first stage. A summation circuit combines the first and second analog intermediate output signals to generate an amplified output signal.

Abstract: A pulse width modulation (PWM) amplifier includes a first amplifier stage, a second amplifier stage, and a gain module. The first amplifier stage is configured to amplify an analog input signal in the analog and digital domains using a first pulse width modulation (PWM) generator, to provide a first stage output for coupling to a load. The gain module is configured to amplify a quantization error of the first PWM generator by a predetermined gain. The second amplifier stage is configured to spectrally shape and attenuate the amplified quantization error of the first PWM generator using a second PWM generator, to provide a second stage output for coupling to the load.

Abstract: An amplifier includes first and second stages. The first stage includes an input node for receiving an analog input signal, an analog digital converter for converting the analog input signal to a digital input signal, and a first switching circuit for outputting a first analog intermediate output signal in response to receiving a digital pulse width modulated signal that is based on the digital input signal. The second stage is configured to receive a pulse width modulation quantization error of the first stage, scale the pulse width modulation quantization error of the first stage by a gain factor to produce a scaled pulse width modulation quantization error of the first stage, and output a second analog intermediate output signal based on the scaled pulse width modulation quantization error of the first stage. A summation circuit combines the first and second analog intermediate output signals to generate an amplified output signal.

Abstract: Systems, apparatus and methods are provided for the real-time positional manipulation of stereoscopic (3D) subtitles in a stereoscopic viewing environment. A stereoscopic subtitling workstation is provided for creating stereoscopic subtitling content for use with stereoscopic video content in which stereoscopic subtitling content can be manipulated and adjusted in real-time in a stereoscopic viewing environment to set the desired viewing position and appearance parameters for the stereoscopic subtitling content. The stereoscopic subtitling workstation may further automatically analyze the stereoscopic video content and automatically generate optimal viewing parameters for the stereoscopic subtitling content, including its 3D offset, according to desired appearances and interaction between such content.

Abstract: Systems, apparatus and methods are provided for the real-time positional manipulation of stereoscopic (3D) subtitles in a stereoscopic viewing environment. A stereoscopic subtitling workstation is provided for creating stereoscopic subtitling content for use with stereoscopic video content in which stereoscopic subtitling content can be manipulated and adjusted in real-time in a stereoscopic viewing environment to set the desired viewing position and appearance parameters for the stereoscopic subtitling content. The stereoscopic subtitling workstation may further automatically analyze the stereoscopic video content and automatically generate optimal viewing parameters for the stereoscopic subtitling content, including its 3D offset, according to desired appearances and interaction between such content.