Abstract: A display control device includes a hardware processor. The hardware processor implements functions of a first operating system, a second operating system, and a hypervisor. The first operating system controls execution of at least one of a first application and a second application. The first application serves to generate a first content image to be displayed on a first display device mounted on a vehicle. The second application serves to generate a second content image to be displayed on a second display device mounted on the vehicle. The second operating system is different from the first operating system. The hypervisor controls execution of the first operating system and the second operating system.

Abstract: The travel assistance apparatus includes: a first Operating System (OS) that controls execution of at least one of a first application and/or a second application, the first application being for specifying a first travel control amount of a vehicle based on first movement information on a position and a speed of an object around the vehicle, the second application being for specifying a second travel control amount of the vehicle based on second movement information on a position and a speed of the object; a second OS that controls execution of a third application for performing travel control of the vehicle based on at least one of the first travel control amount and/or the second travel control amount; and a hypervisor that is executed on a processor and controls execution of the first OS and the second OS.

Abstract: The present disclosure facilitates providing a display control apparatus, a display control system, and a display control method. The display control apparatus includes: a first OS that controls execution of a first application for generating a first display image displayed on a first display apparatus mounted on a vehicle; a second OS that controls execution of a second application for generating a second display image displayed on a second display apparatus mounted on the vehicle; and a hypervisor that is executed on a processor and controls execution of the first OS and the second OS.

Abstract: An audio decoding device of the present invention includes: a decoding unit decoding a stream to a spectrum coefficient, and outputting stream information when a frame included in the stream cannot be decoded; an orthogonal transformation unit transforming the spectrum coefficient to a time signal; a correction unit generating a correction time signal based on an output waveform within a reference section that is in a section that overlaps between an error frame section to which the stream information is outputted and an adjacent frame section and that is a section in the middle of the adjacent frame section, when the decoding unit outputs the stream information: and an output unit generating the output waveform by synthesizing the correction time signal and the time signal.

Abstract: A teleconference terminal apparatus including: an input unit which receives a speech signal; an analyzing unit which calculates a target size on a predetermined segment basis of a speech signal; a coding unit which codes the speech signal to generate a data stream, so that the coded data size on a predetermined segment basis becomes the target size corresponding to each predetermined segment; a stream transmitting unit which transmits to a network the data stream; a receiving unit which receives the data stream transmitted from another terminal apparatus; a filtering unit which determines whether segment data is to be decoded based on data size for each predetermined segment in the received data stream, the segment data being included in the data stream; a decoding unit which decodes segment data determined to be decoded to generate a speech signal; and an output unit which outputs the generated speech signal.

Abstract: A signal processing device includes a generation unit that generates a second signal from a first signal that is obtained by down mixing two signals; a mixing coefficient determination unit that determines, based on a value L and a value ?, a mixing degree for mixing the first signal and the second signal; and a mixing unit that mixes the first signal and the second signal based on the mixing degree determined by the mixing coefficient determination unit. The generation unit includes a first filter that generates a low frequency band signal in the second signal, from a low frequency band signal in the first signal; and a second filter that generates a high frequency band signal in the second signal, from a high frequency band signal in the first signal. The first filter is a filter unit which, for a complex-number signal, de-correlates an input signal and adds a reverberation component by using a delay unit and an all pass filter, and the processing unit is a filter unit different from the first filter.

Abstract: Provided is a multi-channel acoustic signal processing device by which loads of arithmetic operations are reduced. The multi-channel acoustic signal processing device includes: a decorrelated signal generation unit, and a matrix operation unit and a third arithmetic unit. The decorrelated signal generation unit generates a decorrelated signal w? indicating a sound which includes a sound indicated by an input signal x and reverberation, by performing reverberation processing on the input signal x. The matrix operation unit and the third arithmetic unit generate audio signals of m channels, by performing arithmetic operation on the input signal x and the decorrelated signal w? generated by the decorrelated signal generation unit, using a matrix R3 which indicates distribution of a signal intensity level and distribution of reverberation.

Abstract: Provided is an audio decoder which can reduce an amount of arithmetic operations while suppressing occurrence of aliasing noise. The audio decoder includes: a decoder (102) and an analysis filter bank (110) which generate, from a coded down-mixed signal, the first frequency band signal (x) corresponding to a down-mixed signal (M); a channel expansion unit (130) which converts the first frequency band signal (x) generated by the analysis filter bank (110) into output signals (y) corresponding to respective audio signals of N channels, using BC information; an synthesis filter bank (140) which performs band synthesis for the output signals (y) generate by the channel expansion unit (130) and thereby converts the output signals (y) into the respective audio signals of the N channels on a time axis; and an aliasing noise detection unit (120) which detects occurrence of aliasing noise in the first frequency band signal (x).

Abstract: To provide an acoustic signal processing apparatus which can reduce the amount of calculation in matrix arithmetic. An acoustic signal processing apparatus converts down-mixed acoustic signals of NI channels to acoustic signals of NO channels, where NO>NI.

Abstract: A coding apparatus generates coded data by coding inputted data in a predetermined unit basis, maps one or more units of the coded data onto a packet of fixed length and outputs the packet. The coding apparatus includes a storage unit that stores the coded data and outputs the data size of the stored coded data, and a packetization unit that maps the coded data stored in the storage unit onto the packet and outputs the header size assigned to the one or more units of the coded data and the payload size of the packet.

Abstract: A temporal processing apparatus includes: a splitter splitting an audio signal, included in the sub-band domain, into diffuse signals indicating reverberating components and direct signals indicating non-reverberating components; a downmix unit generating a downmix signal by downmixing the direct signals; BPFs respectively generating a bandpass downmix signal and bandpass diffuse signals; normalization processing units respectively generating a normalized downmix signal and normalized diffuse signals; a scale computation processing unit computing, on a predetermined time slot basis, a scale factor indicating the magnitude of energy of the normalized downmix signal with respect to energy of the normalized diffuse signals; a calculating unit generating scale diffuse signals; a HPF generating high-pass diffuse signals; an adding unit generating addition signals; and a synthesis filter bank performing synthesis filter processing on the addition signals and transforming the addition signals into the time domains.

Abstract: Provided are an audio encoding device and an audio decoding device, by which optimal trade-off between code rates and sound quality can be flexibly adjusted. A variable frequency segmentation encoding unit includes: difference degree calculation units for calculating a difference degree between first and second input signals depending on a segmentation method for segmenting a frequency band into sub-bands; a selection unit for selecting one of the segmentation methods; and a difference degree and segmentation information encoding unit for encoding the selected method and the difference degree for each sub-band. A variable frequency segment decoding unit includes: a segmentation information decoding unit for decoding the segmentation information to learn the segmentation method; a switching unit for outputting a difference degree code corresponding to the segmentation method; and difference degree decoding units for decoding the difference degree code to the difference degree for each sub-band.

Abstract: The multi-channel decoding device (20) according to the present invention is a multi-channel decoding device which converts a monaural frequency signal (106) of an input channel count that is at least one into adjustment frequency signals (109) of an output channel count that is greater than the input channel count. The multi-channel decoding device (20) includes a channel expansion unit (102) which generates expansion frequency signals (107) of the output channel count by expanding the channel count of the monaural frequency signal (106) of the input channel count, and a sound quality adjustment unit (132) which generates the adjustment frequency signals (109) of the output channel count by adding, at a predetermined ratio, one of the expansion frequency signals (107) of the output channel count and the monaural frequency signal (106).

Abstract: Provided is an audio decoder which can reduce an amount of arithmetic operations while suppressing occurrence of aliasing noise. The audio decoder includes: a decoder (102) and an analysis filter bank (110) which generate, from a coded down-mixed signal, the first frequency band signal (x) corresponding to a down-mixed signal (M); a channel expansion unit (130) which converts the first frequency band signal (x) generated by the analysis filter bank (110) into output signals (y) corresponding to respective audio signals of N channels, using BC information; an synthesis filter bank (140) which performs band synthesis for the output signals (y) generate by the channel expansion unit (130) and thereby converts the output signals (y) into the respective audio signals of the N channels on a time axis; and an aliasing noise detection unit (120) which detects occurrence of aliasing noise in the first frequency band signal (x).

Abstract: An audio decoding device of the present invention includes: a decoding unit decoding a stream to a spectrum coefficient, and outputting stream information when a frame included in the stream cannot be decoded; an orthogonal transformation unit transforming the spectrum coefficient to a time signal; a correction unit generating a correction time signal based on an output waveform within a reference section that is in a section that overlaps between an error frame section to which the stream information is outputted and an adjacent frame section and that is a section in the middle of the adjacent frame section, when the decoding unit outputs the stream information: and an output unit generating the output waveform by synthesizing the correction time signal and the time signal.

Abstract: A teleconference terminal apparatus (200) including: an input unit (201) which receives a speech signal; an analyzing unit (202) which calculates a target size on a predetermined segment basis of a speech signal; a coding unit (203) which codes the speech signal to generate a data stream, so that the coded data size on a predetermined segment basis becomes the target size corresponding to each of predetermined segments; a stream transmitting unit (204) which transmits to a network the generated data stream; a receiving unit (205) which receives the data stream transmitted from another terminal apparatus; a filtering unit (206) which determines whether or not segment data is to be decoded on a basis of a data size for each predetermined segment in the received data stream, the segment data being included in the data stream; a decoding unit (207) which decodes segment data determined to be decoded to generate a speech signal; and an output unit (209) which outputs the speech signal generated by the decoding uni

Abstract: Provided is a multi-channel acoustic signal processing device by which loads of arithmetic operations are reduced. The multi-channel acoustic signal processing device (100) includes: a decorrelated signal generation unit (181), and a matrix operation unit (187) and a third arithmetic unit (186). The decorrelated signal generation unit (181) generates a decorrelated signal w? indicating a sound which includes a sound indicated by an input signal x and reverberation, by performing reverberation processing on the input signal x. The matrix operation unit (187) and the third arithmetic unit (186) generate audio signals of m channels, by performing arithmetic operation on the input signal x and the decorrelated signal w? generated by the decorrelated signal generation unit (181), using a matrix R3 which indicates distribution of a signal intensity level and distribution of reverberation.

Abstract: To provide an acoustic signal processing apparatus which can reduce the amount of calculation in matrix arithmetic. An acoustic signal processing apparatus (24) converts down-mixed acoustic signals of NI channels to acoustic signals of NO channels, where NO>NI.

Abstract: A temporal processing apparatus (energy shaping apparatus) (600a) includes: a splitter (601) splitting an audio signal, included in the sub-band domain, which are obtained through a hybrid time and frequency transformation into diffuse signals indicating reverberating components and direct signals indicating non-reverberating components; a downmix unit (604) generating a downmix signal by downmixing the direct signals; BPFs (605 and 606) respectively generating a bandpass downmix signal and bandpass diffuse signals, by performing bandpass processing on the downmix signal and the diffuse signals on a sub-band-to-sub-band basis, which are split on the sub-band basis; normalization processing units (607 and 608) respectively generating a normalized downmix signal and normalized diffuse signals by normalizing the bandpass downmix signal and the bandpass diffuse signals with regard to respective energy; a scale computation processing unit (609) computing, on a predetermined time slot basis, a scale factor indicati

Abstract: A signal processing device (1) includes: a generation unit (32) which generates a second signal from a first signal that is obtained by downmixing two signals; a mixing coefficient determination unit (40) which determines, based on a value L and a value ?, a mixing degree for mixing the first signal and the second signal, the value L indicating a level ratio between the two signals, and the value ? indicating a phase difference between the two signals; and a mixing unit (50) which mixes the first signal and the second signal based on the mixing degree determined by the mixing coefficient determination unit (40). The generation unit (32) includes: a first filter (302) which generates a low frequency band signal in the second signal, from a low frequency band signal in the first signal; and a second filter (a processing unit 307) which generates a high frequency band signal in the second signal, from a high frequency band signal in the first signal.