Abstract:
본 발명의 가청 주파수 대역 오디오 신호의 저전력용 수신 방법은 (a) 제1 및 제2 인코더가 입력 신호를 스캐닝하여 가청 주파수 대역을 필터링하는 단계; (b) 분할기가 입력 신호를 복수개의 주파수 구간으로 분할하여 복수개의 주파수 서랍을 생성하고, 복수개의 박스로 패키징하는 단계; (c) 제1 및 제2 인코더가 필터링된 가청 주파수 대역의 구간에 따라 방송 시간에 맞춰 제1 및 제2 키 신호를 생성하는 단계; (d) 제1 및 제2 인코더가 양자화 변수를 이용하여 생성된 제1 및 제2 키 신호를 암호화하고, 가청 주파수 대역의 입력 신호에 암호화된 제1 및 제2 키 신호를 삽입하여 인코딩 오디오 신호를 출력하는 단계; (e) 방송 장치가 인코딩 오디오 신호를 인가받아 디지털 신호로 변환하여 전송하고, 수신 장치가 전송된 디지털 신호를 인가받아 아날로그 신호로 변환하여 출력하는 단계; (f) 모바일 기기가 아날로그 신호를 인가받아 인코딩 오디오 신호의 특정 패턴을 인식하여 활성화되어 제1 및 제2 키 신호를 검출하는 단계; 및 (g) 서버가 검출된 제1 및 제2 키 신호를 인가받아 기 저장되어 있는 정보 중에서 매칭되는 정보를 추출하여 모바일 기기로 전송하는 단계;를 포함하는 것을 특징으로 한다.
Abstract:
In a particular aspect, an apparatus includes a first network interface. The first network interface is configured to receive a packet via a packet-switched network. The packet may include a primary coding of a first audio frame and a redundant coding of a second audio frame. The apparatus further includes a processor. The processor is configured to generate a modified packet that includes one or more bits that indicate signaling information or packet decoding information. The signaling information or packet decoding information may correspond to decoding of at least one of the primary coding or the redundant coding. The apparatus further includes a second network interface configured to transmit the modified packet via a circuit-switched network.
Abstract:
An apparatus includes a network interface configured to receive, via a circuit-switched network, a packet. The packet includes a primary coding of a first audio frame, redundant coding of a second audio frame, and one or more bits that indicate signaling information. The signaling information corresponds to a decode operation of at least one of the primary coding or the redundant coding. The apparatus further includes a decoder configured to decode a portion of the packet based on the signaling information.
Abstract:
A system, an article, and a method of audio quality and latency adjustment for audio processing by using audio feedback. The system, the article, and the method of audio processing including: transmitting at least audio data comprising at least an audio signal to be received by a receiver to directly or indirectly emit the audio signal; receiving, by using a microphone device, feedback of the emitted audio signal; and adjusting the audio data to be transmitted depending, at least in part, on the feedback.
Abstract:
A system may include a delta-sigma analog-to-digital converter and a digital compression circuit. The delta-sigma analog-to-digital converter may include a loop filter having a loop filter input configured to receive an input signal and generate an intermediate signal responsive to the input signal, a multi-bit quantizer configured to quantize the intermediate signal into an uncompressed digital output signal, and a feedback digital-to-analog converter having a feedback output configured to generate a feedback output signal responsive to the uncompressed digital output signal in order to combine the input signal and the feedback output signal at the loop filter input. The digital compression circuit may be configured to receive the uncompressed digital output signal and compress the uncompressed digital output signal into a compressed digital output signal having fewer quantization levels than that of the uncompressed digital output signal.
Abstract:
Gestion de la perte de trame dans un contexte de transition FD/LPD L'invention concerne un procédé de décodage d'un signal numérique codé selon un codage prédictif et selon un codage par transformée, comprenant les étapes suivantes : - décodage (304) prédictif d'une trame précédente du signal numérique, codée par un ensemble de paramètres de codage prédictif; - détection (302) de la perte d'une trame courante du signal numérique codé; - génération (312) par prédiction, à partir d'au moins un paramètre de codage prédictif codant la trame précédente, d'une trame de remplacement de la trame courante; - génération (316) par prédiction, à partir d'au moins un paramètre de codage prédictif codant la trame précédente, d'un segment supplémentaire de signal numérique; - stockage (317) temporaire dudit segment supplémentaire de signal numérique.
Abstract:
In accordance with an example embodiment of the present invention, disclosed is a method and an apparatus thereof forselecting a packet loss concealment procedure for a lost audio frame of a received audio signal. A method forselecting a packet loss concealment procedurecomprises detecting an audio type of a received audio frame and determining a packet loss concealment procedure based on the audio type. In the method, detecting an audio type comprisesdetermininga stability of a spectral envelope of signals of received audioframes.
Abstract:
An apparatus for generating an error concealment signal, comprises: an LPC (linear prediction coding) representation generator (100) for generating a first replacement LPC representation and a different second replacement LPC representation; an LPC synthesizer (106) for filtering a first codebook information using the first replacement representation to obtain a first replacement signal and for filtering a different second codebook information using the second replacement LPC representation to obtain a second replacement signal; and a replacement signal combiner (110) for combining the first replacement signal and the second replacement signal to obtain the error concealment signal (111).
Abstract:
A sampler module may divide an audio signal into a series of sequential samples. A signal quality detector module may identify a consistent brick wall frequency of the audio signal spanning a plurality of the sequential samples at an outset of the audio signal and determine a signal treatment indication proportional to the brick wall frequency. A signal enhancer module may sequentially receive and analyze one or more sample components of the audio signal to identify lost parts of the audio signal in the one or more sample components of respective sequential samples, and generate, in accordance with the signal quality indication, a corresponding signal treatment for each of the one or more sample components of respective sequential samples having a corresponding identified lost part.