Abstract: A slice decoder control circuit (46), having received the input of a parameter of a picture layer, sequentially supplies the parameter of the picture layer and the write pointer of a slice 1 to a slice decoder (47), the parameter of the picture layer and the write pointer of a slice 2 to a slice decoder (48), and the parameter of the picture layer and the write pointer of a slice 3 to a slice decoder (49), and causes the slice decoders to decode the respective parameters and write pointers. On the basis of the input of signals indicating the completion of decoding processing inputted from the slice decoders (47) to (49), the slice decoder control circuit (46) supplies the write pointer of a slice 4 to the slice decoder (48) and causes the slice decoder (48) to decode the write pointer at timing A, and supplies the write pointer of a slice 5 to the slice decoder (49) and causes the slice decoder (49) to decode the write pointer at timing B.

Abstract: Encoding parameters of picture and higher layers of importance to a number of applications, and encoding parameters of slice and lower layers of no importance to all applications are converted into auxiliary packets inserted respectively into a V-blanking area and an H-blanking area of a video-data signal output by a history-information-multiplexing apparatus employed in a video-decoding system. On the other hand, a video-encoding system extracts back the auxiliary packets superposed on the V-blanking area and the H-blanking area from an input base-band video signal. As a result, a technique of superposing information on data can be changed in accordance with the importance of the information and required information can be fetched with ease.

Abstract: A video decoder reproduces an MP@ML/MPEG-2 video bit stream at an arbitrary speed. When a slice decoder control circuit receives parameters, the slice decoder control circuit sequentially supplies parameters of a picture layer and a write pointer associated with a first slice to a first slice decoder, the parameters of the picture layer and a write pointer associated with a second slice to a second slice decoder, the parameters of the picture layer and a write pointer associated with a third slice to a third slice decoder, so that the slices are decoded by the respective slice decoders. On the basis of signals indicating completion of decoding, received from the first to third slice decoders, the slice decoder control circuit gives commands the first to third slice decoders to decode particular slices.

Abstract: An optical measuring instrument which enables measurement of necessary data in a short period of time and uses a light with a short coherence length. In this instrument, such a light emitted from a light source is divided into a measurement light and a plurality of reference lights. The plurality of reference lights are processed by different frequency modulations, and then multiplexed with a light reflected from a measurement object irradiated by the measurement light. On the basis of an output of a photoelectric converter for detecting the level of the multiplexed light and the frequency of each reference light, optical characteristic data related to a plurality of measurement points are calculated.

Abstract: A method of and apparatus for identifying a signal transmitting source detects a switching of a signal on the reception side thereby to prevent a transmission error from occurring when a signal is switched. The apparatus for identifying a signal transmitting source comprises a transmitting source identifying code extracting circuit for extracting a transmitting source identifying code provided in a SDDI format header of a received signal, a preceding transmitting source identifying code holding circuit for detecting a change of the transmitting source identifying code, and a transmitting source identifying code comparing circuit for detecting a switching of a transmitted signal based on the transmitting source identifying code thus changed, thereby detecting a switching of the transmitting source.

Abstract: In a signal processing apparatus having a plurality of signal processing circuits where predetermined data is to be output sequentially through the plurality of signal processing circuits, when signal processing is performed at each signal processing circuit, timing necessary for respective signal processing is added to the data to be transmitted, as a header information, so that a complicated construction, such that a circuit for obtaining timing necessary for signal processing is added at each signal processing circuit, can be avoided, and the data can be securely processed and delivered at each signal processing circuit.

Abstract: Proper operation of a recording and reproducing apparatus is verified by comparing, after a suitable delay, error detection codes calculated for compressed data prior to being recorded on a medium with error detection codes calculated for the corresponding compressed data reproduced from the medium, thereby reducing the amount of delay memory needed to temporarily store the error detection codes calculated prior to recording of the data.

Abstract: When a magnetic track is formed, the magnetic track is divided into a plurality of track areas in its longitudinal direction. Information signals are recorded in the divided track areas independently of each other. At a portion of the magnetic track, there is provided a reference track area in which a specific reference signal is recorded. When an information signal is recorded in either of the track areas, the reference signal is played back from the reference track area, and the information signal is recorded in the track area corresponding to the information signal using the played back reference signal as a reference for timing of the recording.With the described arrangement, when a plurality of information signals are recorded in a plurality of track areas, which are formed by dividing a track in its longitudinal direction, independently of each other, a signal recorded in a track area is prevented from adversely affecting another signal recorded in a neighboring track area.

Abstract: A method and an apparatus capable of transmitting and receiving multiplexed signals as serial data in such a manner that, even in a state where a continuous signal such as an audio digital signal is not in synchronism with another signal such as a video digital signal, the continuous signal can be properly reproduced on a reception side. Address data based on a word clock of another digital signal is sampled on a transmission side in accordance with a sampling clock of the continuous signal, and the sampled address value is included in the multiplexed signals to be thereby transmitted together to the reception side.

Abstract: An image data processing apparatus generates output data representing an image in a spatial domain from a plurality of sets of input data, each representing in a spatial frequency domain a sub sampled version of the image in the spatial domain. An error detector detects any erroneous parts of the plurality of sets of input data in the spatial frequency domain. Each of the plurality of sets of input data is transformed from the spatial frequency domain into a sub sampled version of the image in the spatial domain. Any parts of the sub sampled versions that are dependent upon an erroneous part of a set of input data are interpolated from one or more spatially adjacent parts of one or more other sub sampled versions. The sub sampled versions are combined to form the output data.

Abstract: An information data recording apparatus includes a DCT (discrete cosine transform) circuit (3) for processing a video signal in a DCT fashion, a quantizer (4) for quantizing an output signal of the DCT circuit (3), outer code circuits (5) and (10) for adding an error correction code to quantized data from the quantizer (4), and a recording head (13) for recording output data on a magnetic tape (14), whereby a high frequency component of data or outer code is recorded on first and last tracks of tracks of one field. Of the tracks constructing one field, a high frequency component of data or outer code that is less affected by a reproducing error is recorded on respective end tracks that have the large possibility that original recorded data will be broken by a mis-tracking upon editing.

Abstract: When a video signal is recorded on a magnetic tape (14), a high frequency signal component of data converted by a DCT (discrete cosine transform) converter (3) in a DCT fashion or an outer code is recorded on a recording track at its beginning portion in which a waveform of a reproduced output is considerably deteriorated in amplitude when a reproducing head (15) starts to reproduce the recording track. Also, a low frequency signal component of data converted by the DCT converter (3) in a DCT fashion is recorded on the recording track at its succeeding portion in which the reproducing head (15) can stably reproduce the recording track by a recording head (13).

Abstract: A triethylene glycol derivative is added to p-dichlorobenzene so as to prevent consolidation and improve flowability of p-dichlorobenzene.

Abstract: A digital signal transmission device for reproducing plural channel informational data from a digital signal formed of plural channels of informational data accompanied by channel identification data for identifying the channels in which the informational data is to be processed the digital signal having been transmitted through a single transmission line. Identification data conversion means converts channel identification data from the form which accompanies the digital signal to a modified form that identifies different channels in which the informational data will be processed.