Sony Corporation

Masumi Ono

Kouichi Yasuda

Atsushi Fukumoto

Shunji Yoshimura

Toshiki Udagawa

Mikio Kamada

Masamichi Asukai

Tatsuya Narahara

Masumi Ohta

Kazunori Ohmura

Atsushi Fukimoto

An action transmission system, terminal apparatus, action transmission method, and action transmission program are provided. The present invention provides an action transmission system including a first terminal apparatus for detecting a physical variation applied by a first user and a second terminal apparatus for outputting information to a second user as the physical variation. The first terminal apparatus transmits, to the second terminal apparatus, variation information indicative of a variation in physical quantity and intensity information subjectively set by the first user for the physical quantity by use of the physical variation applied by the first user. The second terminal apparatus receives the variation information and the intensity information from the first terminal apparatus, amplifies the received variation information by an amplification factor subjectively set by the second user to the intensity information, and outputs the amplified variation information as a physical variation.

Action transmission system, terminal apparatus, action transmission method, and action transmission program

An information processing apparatus, capable of identifying vital sign information. A learning unit identifies an emotion/state of the user by comparing the generated feature vectors with feature vectors accumulated in a storage unit. Information indicating the resultant identified emotion/state of the user is output to an output unit via an output controller.

Information processing device and method, program, and recording medium

It is an object of the present invention to increase an amount of information recorded on an optical disk having at least two information recording layers. An optical disk having a plurality of information recording layers according to the present invention includes a transparent substrate, a transparent layer and at least two information recording layers formed on the transparent substrate. The information recording layers are provided so as to sandwich the transparent layer. At least one of the information recording layers has a transmittance varying layer. The transmittance varying layer is made of a material whose transmittance is changed at a predetermined temperature as a threshold value. The transmittance varying layer is made of a phase change material. The threshold value is within the temperature range from 700.degree. to 500.degree.. Crystallization speed of the transmittance varying layer is equal to or slower than 500 ns.

Optical disk

Recording method and recording equipment of optical disc reproducing

An optical disk reproducing apparatus for optical disks which are have a material layer whose reflectivity is lowered when a temperature of this material exceeds a predetermined temperature, is fabricated on a transparent substrate. A plurality of phase pits have been formed in this substrate corresponding to an information signal. The optical disk reproducing apparatus comprises: an optical pickup for reading the information signal by irradiating on a recording plane of the optical disk, a first optical spot for reproducing the information signal, and also second and third optical spots each having lower light intensity than that of the first optical spot. The second and third optical spots located at positions where there is no adverse influence caused by a thermal history of the first optical spot. The optical disk reproducing apparatus further comprises tracking control unit for performing a tracking control of the optical pickup based upon a difference signal between detection signals derived from first and second photo detecting units of the optical pickup, for receiving light of the second and third optical spots reflected from the optical disk.

Optical pickup apparatus for phase changing optical disk

Optical recording medium

Method for reproducing signals recorded on optical recording medium

To increase the track density, that is, to improve the recording density of the optical disk of ultra-high resolving power reproduction type, grooves 4 are formed in a transparent substrate 2; phase pits 1 are formed on groove bottom portions 5 and land portions 6 of the grooves; and further a material layer 3 is laminated. A polycarbonate substrate is used as the transparent substrate 2. The material layer 3 is formed of such a material that the state is partially changed due to heat of the reading light in the optical spot of the reading light but returned to the original state after the reading light has passed, and in addition the reflection factor of the material is changeable according to the state change. The material layer 3 is a ternary compound of Ge.sub.2 Sb.sub.2 Te.sub.3. The thermal conductivity of the transparent substrate 2 is smaller than that of the material layer 3. The temperature of the material layer 3 rises in the laser spot according to the light intensity distribution of the laser, so that the reflection factor changes partially to enable data read operation. The heat conduction suppression due to the presence of the stepped portions of the grooves 4 sharpens the temperature gradient, so that the range in which the reflection factor is increased due to the state change of the material layer 3 can be reduced, thus decreasing the track interval distance and thereby increasing the track density.

Optical disk having intertrack heat conduction suppression

Positional detection of a magneto-optic recording medium for controlling

Temperature detection of a magneto-optic recording medium for

An optical disk having a greatly improved recording density. The disk has a transparent substrate provided with phase pits. A layer of a phase changeable material is formed on the substrate. This phase changeable material is a chalcogen or chalcogenide such as Sb.sub.2 Se.sub.3 or Sb.sub.2 Te.sub.3. When reading light is directed onto the disk, a part of the layer of the phase changeable material is melted within the spot of the reading light beam, and the reflectivity changes and a phase pit is read through the melted part. After the reading, the melted portion recrystallizes.

Growing community of inventors

Kanagawa, Japan

Masumi Ono