Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Daifuku Co., Ltd.

Yoshikazu Hayashi

Hiroshi Azakami

Noriaki Omoto

Takaaki Konishi

Takashi Hasegawa

Teruaki Hasegawa

Masahiro Hamada

Tomohiro Kimura

Kazuya Ueda

Ippei Kanno

Izuru Matsubara

Shougo Sasaki

Makoto Sekitoh

Yousuke Kimura

Seiichi Koga

Kyotani Hisashi

Kenji Sakita

Nobuhiro Ogura

Misao Teshima

Tomohiru Kimura

An indoor unit of an in-ceiling mount type air conditioner including a box-shaped housing having a top plate portion, a side plate portion and an opening portion at the lower portion thereof, a face panel detachably mounted on the opening portion of the housing, an indoor heat exchanger through which the inside of the housing is compartmented into a primary side and a secondary side, and an air blower secured to the top plate portion of the housing that faces the primary side, has a primary side heat insulating material is provided to the top plate portion so as to face the primary side of the housing and a secondary side heat insulating material provided to the side plate portion so as to face the secondary side of the housing, wherein the primary side heat insulating material is provided with an opening portion through which the air blower is fixed to the top plate portion.

In-ceiling mount type air conditioner and indoor unit thereof

A carrier recovering apparatus, in which degradation of the demodulation performance caused when a pilot signal cannot be normally received is suppressed, includes a rotation calculator for multiplying a baseband signal and an oscillation signal and outputting a multiplied signal; a pilot signal extractor for extracting a pilot signal from the signal output from the rotation calculator; an error detection controller for outputting a phase error between the pilot signal and a reference signal as a value restricted within a given range; a loop filter for smoothing the phase error output from the error detection controller and outputting the smoothed phase error; and a variable frequency oscillator for generating a signal in accordance with the output of the loop filter and outputting the generated signal as the oscillation signal.

Carrier recovering apparatus and carrier recovering method

A digital broadcast transmission device generates channel combination information associating a plurality of physical channels. The digital broadcast transmission device divides a bit stream into a plurality of bit streams, the bit stream including program-related information having added thereto channel combination information, and transmits the divided bit streams on the plurality of physical channels, respectively. A digital broadcast reception device selects the plurality of physical channels using a plurality of front ends based on the channel combination information, and demodulates broadcast waves received on the plurality of physical channels, respectively. The digital broadcast reception device combines bit streams obtained from the demodulation, and outputs the combined bit stream. The digital broadcast reception device also simultaneously transmits a light bit stream on a different single physical channel, the light bit stream being a bit stream smaller in amount of information than the combined bit stream.

Digital broadcast transmission device and digital broadcast reception device

A set-top box is configured to mount therein a security device which stores security information on a broadcasting entity, and extracts transmission information for receiving a broadcasting signal modulated from a control signal from a head end. In the set-top box, it is detected that the security device is not mounted into a receiver, the demodulation mode for the broadcasting signal and/or the frequency of the broadcasting signal is changed to retrieve the broadcasting channel on which the transmission information on the broadcasting signal is transmitted, and then, the broadcasting signal on the retrieved broadcasting channel is received. When it is detected that a demodulator is synchronized with the broadcasting signal, the transmission information on the broadcasting channel is extracted from the demodulated broadcasting signal, the broadcasting signal is received based on the extracted transmission information on the broadcasting signal.

Broadcasting signal receiver apparatus provided with controller for controlling demodulation mode, and apparatus for controlling demodulation mode

A through section shielding construction is disclosed in which a partitioning wall defines a slit-like opening extending along a lateral direction as a moving passage of a penetrating member relative to the partitioning wall, and a plurality of shielding plates for closing the slit-like opening are juxtaposed along the slit-like opening as being suspended pivotally to be pushed open one after another by the penetrating member moving along the slit-like opening. The shielding plates are provided as adjacent pairs, and there is provided an operative coupling mechanism for operably coupling, with each other, two shielding plates constituting each pair in such a manner that in association with one of the paired shielding plates being pushed open in one direction by the penetrating member, the other shielding plate is pivotally opened in the opposite direction to the one direction.

Through section shielding construction

In a high-frequency signal level detection apparatus for detecting an inputted signal level of a high-frequency signal, an AGC circuit executes an AGC on an intermediate frequency (IF) signal obtained by converting a frequency of a received high-frequency signal, using an RFAGC value and an IFAGC value for controlling gains of the high-frequency signal and the IF signal, respectively, based on the IF signal so that an output level of the IF signal is substantially constant. A controller previously measures first and second relational data, indicating an RFAGC value and an IFAGC value relative to the inputted signal level of the received high-frequency signal, respectively, measures the RFAGC and IFAGC values when a high-frequency signal to be measured is received, and detects the inputted signal level of the received high-frequency signal using the measured first and second relational data based on the measured RFAGC and IFAGC values.

High-frequency signal level detection apparatus and high-frequency signal receiver apparatus using the same

A carrier recovery apparatus capable of detecting a phase error of modulation signal by a simple calculation, reducing the circuit scale, and improving the frequency capture characteristic and phase jitter characteristic is presented. This carrier recovery apparatus comprises a symbol estimating unit for estimating the transmitted symbol, a phase error detector for generating a normalized phase error signal on the basis of the estimated symbol and reception signal, a loop filter for filtering the phase error, and a numerical control oscillator controlled by the loop filter.

Carrier recovery apparatus

A method and device determines the metric value threshold used in a Viterbi synchronization evaluation circuit which enables to synchronize with a correct coding rate when multiple coding rates exist in the input signal to a Viterbi decoder. A first coding rate setting unit sets a coding rate for which the metric value threshold may need to be identified, and a second coding rate setting unit sets a coding rate other than the coding rate set by the first coding rate setting unit. A metric value threshold setting unit decreases values gradually from the maximum metric value threshold as the synchronous/asynchronous state of the Viterbi decoder is monitored by a synchronous/asynchronous monitor in order to find the minimum metric value threshold where the Viterbi decoder is not completely synchronized limit for judging asynchronicity). This minimum value is determined as the metric value threshold for the coding rate set by the first coding rate setting unit.

Method and device for determining thresholds of metric values used in

A digital broadcast receiver for receiving a digital modulation signal of the present invention includes channel selection means inputting a digital modulation signal of a radio frequency band and frequency converting a desired digital modulation signal into a designated intermediate frequency signal; oscillation means for generating a local oscillation signal used for frequency conversion at the channel selection means; oscillation frequency control means for controlling a frequency of the local oscillation signal at the oscillation means; phase noise characteristic control means for improving a phase noise characteristic of the local oscillation signal generated at the oscillation means; filter means for extracting the intermediate frequency signal selected at channel selection means; orthogonal detection means for orthogonally detecting the intermediate frequency signal extracted at the filter means; A/D converter means for converting the analog output of the orthogonal detection means into a digital signal; and digital demodulation means for digitally demodulating the output of the A/D converter means; and makes a high performance digital reception possible which can improve an AFC function by the channel selection means and can improve a bit error rate at the same time.

Digital broadcast receiver

A receiving apparatus is presented, in which a channel frequency can be selected over a wide band with an increased attenuation at an image frequency and/or at a local oscillation frequency by including a tunable filter having a following construction. Microstrip lines are connected between either one of the input or the output terminal or both of the input and output terminals of the tunable filter; a plurality of resonant circuits are formed by each of a plurality of coils and a plurality of variable capacitance diodes; and the coils are electromagnetically coupled and where a voltage applied to each cathode of each of a plurality of variable capacitance diodes through each of a plurality of resistors is controlled to tune a frequency to be received.

Growing community of inventors

Ibaraki, Japan

Yoshikazu Hayashi